A financial analyst constructs a statistical model to represent the market shares of several similar companies. She then collects data over the
next month to evaluate her model. At the end of the month, she finds that for one of the companies, the difference between her model and the
data is 5%.
She decides to collect data for an additional two months. If her model is valid, what could she expect from the total data collected after three
months?
ОА. .
The difference between the data and the model will get smaller.
OB.
The difference between the data and the model will stay the same.
OC.
It is impossible to predict how the difference between the data and the model will change.
OD.
The difference between the data and the model will get larger
Answers
Answer:
Gets Smaller
If her model is valid, she expect from the total data collected after three months that the difference between the data and the model will get smaller. The correct option is A.
What is market shares?When some amount of money is used to buy the share of a particular company, then the percentage of total sales generated by that company is called the market share.
A financial analyst collects data over the next month to evaluate her model. At the end of the month, she finds that for one of the companies, the difference between her model and the data is 5%. She decides to collect data for an additional two months.
If the model is valid, then she can assume that her assumptions are correct over the model according to the data. It will result in decreasing the bridge gap between the model and the collected data.
Therefore, If her model is valid, she expect from the total data collected after three months that the difference between the data and the model will get smaller. The correct option is A.
Learn more about market shares.
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Related Questions
Mike, Kate, and Wendy are sick with the flu, but they still come to
school on Monday. They arrive at 8am. By 9am (Hour 1), each of them
has already infected two of his or her friends. By 10am (Hour 2), each of
Mike's, Kate's, and Wendy's friends infect two other people, meaning 12
new people have been infected by the second hour.
a. If the school day ends at 3pm, how many students in all will be
infected at the end of the school day?
Answers
Can someone help me with two geometry questions? They are in a PDF document that I attached.
Answers
Answer:
use
x+y=z
and see magic answer is there
What is the value of this expression?
8-4x3^3+11
Answers:
119
23
-89
-17
Answers
[tex]8 - 4( {3}^{3} ) + 11 \\ 8 - 4(27) + 11 \\ 8 - 108 + 11 \\ 8 - 97 \\ - 89[/tex]
Math question 35 points please answer correctly
Answers
Answer:
B. Decreasing; The slope of the line between points D and E is negative
Step-by-step explanation:
The graph clearly shows that the speed is decreasing between these points. This narrows down your options to either Option B or Option D. A completely vertical line has a slope of undefined. The line is not completely vertical and undefined, so Option D is incorrect. This leaves B as correct. A negative slope is a line rising right to left.
Hope it helps!
To help retain its readership base in the digital era, a magazine is considering the launch of an online edition. However, it will only be feasible to publish an online edition if more than 35% of current readers would subscribe to the online edition. The magazine contacted a simple random sample of 587 current readers, of which 227 said they would be interested in the online edition. Conduct a hypothesis test to help the magazine decide if it should launch the online edition or not.
Answers
Answer:
Hо:p = 0.35
H1:p > 0.35
Step-by-step explanation:
The magazine wants to check if the the proportion of readers interested in the online edition is equal to 35% (0.35) or greater than 35% (>0.35). Denote by p, the proportion of readers interested in the online edition. Then the null hypothesis,the hypothesis that contains equal-to sign- will be Hо:p = 0.35 and the alternative hypothesis will be H1:p > 0.35.
A total of 472 tickets were sold. They were either adult tickets or student tickets. The number of student tickets were 3 times tge number of adult tickets sold. How many adult tickets were sold?
Answers
Answer:
adult tickets = 118
student tickets = 354
Step-by-step explanation:
a = number of adult tickets
s = number of student tickets
a + s = 472
3a = s
substitute for s
a + 3a = 472
reduce
4a = 472
divide by 4
4a/4 = 472/4
a = 118
s = 354
Josh bought a video game that was 20% off. He paid $45 for the video game. How much was the game ORIGINALLY?
Answers
Answer:
The original price of the game was $54.
HELPPPPPPPPP I WILL GIVE U THE BRAINLEST!!!!!!!!
Answers
Answer:
r = 14
d = 28
r^2=28
Circumference = 87.96
C=2πr=2·π·14≈87.96459
Select two expressions that are equivalent to 8(5t + 7v)
Answers
Answer:
what are the answer choices?
Step-by-step explanation:
no choices, no answer
Answer:
A and D are the correct answers hope this helps :)
The data in the tables below were collected from first year students at a community college. The variable is "number of credit cards." If the table below is a complete probability distribution, what must be the value of T?
Number of Credit Cards (x) 0 1 2 3 4 5
Number of Students (f) 122 40 28 2 2 6
Probability P(x) 0.61 T 0.14 0.01 0.01 0.03
A. 0.4
B. 0.04
C. 0.2
D. 0.02
Answers
Solution :
It is given that P(x) is said to be complete or proper probability distribution if it satisfies the following two ways :
1. [tex]$P(x) \geq 0$[/tex]
2. [tex]$\sum_z P(x) = 1$[/tex]
Now consider,
[tex]$\sum_z P(x) = 1$[/tex]
⇒ [tex]$P(x=0)+P(x=1)+P(x=2)+P(x=3)+P(x=4)+P(x=5)=1$[/tex]
⇒ [tex]$0.61+T+0.14+0.01+0.01+0.03=1$[/tex]
⇒ [tex]$0.8+T=1$[/tex]
⇒ [tex]$T=1-0.8$[/tex]
= 0.2
Therefore, the value of T is 0.2
Thus, option (c) is correct.
(40 points) please help the owners of pet store plan to purchase some hamsters and some rabbits. Each hamster costs 15 and each rabbit costs 25 each. the owners have at most 300 to spend
Answers
Answer:
10 hamsters and 6 rabbits
Step-by-step explanation:
if you take 10x15 for the hamsters you get $150 and then if you take 25x6 you get $150 for the rabbits then add those two numbers and you get $300.
A park planner is designing a dog park
Answers
Answer:
Un planificador de parques está diseñando un parque para perros
The cost of attending your college has once again gone up. Although you have been told that education is investment in human capital, which carries a return of roughly 10% a year, you (and your parents) are not pleased. One of the administrators at your university/college does not make the situation better by telling you that you pay more because the reputation of your institution is better than that of others. To investigate this hypothesis, you collect data randomly for 100 national universities and liberal arts colleges from the 2000-2001 S. News and World Report annual rankings. Next you perform the following regression.
cost 7,311.173,985.20 . Reputation - 0.20 Size +8,406.79. Dpriv
(0.13 2,058.63 (664.58) - 416.38 Dibart - 2,376.51 Dreli ion (2,154.35) (1,121.92) 1,007.56) R' = 0.72 SER 3, 773.35
where Cost is Tuition, Fees, Room and Board in dollars, Reputation is the index used in U.S. News and World Report (based on a survey of university presidents and chief academic officers), which ranges from 1 ("marginal) to 5 ("distinguished"), Size is the number of undergraduate students, and Dpriv, Dlibart, and Dreligion are binary variables indicating whether the institution is private, a liberal arts college, and has a religious affiliation. The numbers in parentheses are heteroskedasticity-robust standard errors
(a) Interpret the results and determine whether or not the coefficients are significantly dif- ferent fromzero. Do the coefficients have the expected sign?
(b) What is the forecasted cost for a liberal arts college, which has no religious affiliation, a size of 1,500 students and a reputation level of 4.5? (All liberal arts colleges are private.)
(c) Suppose that you switch from a private university to a public university, which has a ranking tha's 0.5 lower and 10,000 more students. What is the effect on your cost?
(d) What is the p-value for the null hypothesis that the coefficient on Size is equal to zero? Based on this, should you eliminate the variable from the regression? Why or why not?
(e) You want to test simultaneously the hypotheses ha and bert - 0. Your regression package returns an F-statistic of 1.23. Can you reject the null hypothesis?
(f) Eliminating the Size and Dlibartvariables from your regression, the estimated regression becomes 5,450.35+3,538.84 .
Reputation 1,772.35 (590.49) cost 10,935-70.Dpriv-2, 783.31-Dreligion 575.51) (1,150.57) R20.72 SER- 3,792.68 Why do you think that the effect of attending a private institution has increased now?
Answers
Answer:
a) Interpret the results and determine whether or not the coefficients are significantly dif- ferent fromzero. Do the coefficients have the expected sign?
An increase in reputation by one category, increases the cost by
roughly $3,985. The larger the size of the college/university, the
lower the cost. An increase of 10,000 students results in a $2,000
lower cost. Private schools charge roughly $8,406 more than public
schools. A school with a religious affiliation is approximately $2,376
cheaper, presumably due to subsidies, and a liberal arts college also
charges roughly $416 less. There are no observations close to the
origin, so there is no direct interpretation of the intercept. Other than
perhaps the coefficient on liberal arts colleges, all coefficients have
the expected sign.
(b) What is the forecasted cost for a liberal arts college, which has no religious affiliation, a size of 1,500 students and a reputation level of 4.5? (All liberal arts colleges are private.)
7,311.17 + 3,985.20×4.5 – 0.20×1500
+ 8,406.79×1 – 416.38×1 – 2,376.51×0=$ 32,935
(c) Suppose that you switch from a private university to a public university, which has a ranking tha's 0.5 lower and 10,000 more students. What is the effect on your cost?
Roughly $ 12,400. Since over the four years of education, this
implies approximately $50,000, it is a substantial amount of money
for the average household.
(d) What is the p-value for the null hypothesis that the coefficient on Size is equal to zero? Based on this, should you eliminate the variable from the regression? Why or why not?
Using a one-sided alternative hypothesis, the p-value is 6.2 percent. Variables should not be eliminated simply on grounds of a statistical test. The sign of the coefficient is as expected, and its magnitude makes it important. It is best to leave the variable in the regression and let the reader decide whether or not this is convincing evidence that the size of the university matters
(e) You want to test simultaneously the hypotheses ha and bert - 0. Your regression package returns an F-statistic of 1.23. Can you reject the null hypothesis?
The critical value for F2,∞ is 3.00 (5% level) and 4.61 (1% level). Hence you cannot reject the null hypothesis in this case
(f) Eliminating the Size and Dlibartvariables from your regression, the estimated regression becomes 5,450.35+3,538.84 .
Reputation 1,772.35 (590.49) cost 10,935-70.Dpriv-2, 783.31-Dreligion 575.51) (1,150.57) R20.72 SER- 3,792.68 Why do you think that the effect of attending a private institution has increased now?
Step-by-step explanation:
a.An increase in reputation by one category, increases the cost by
roughly $3,985. The larger the size of the college/university, the
lower the cost. An increase of 10,000 students results in a $2,000
lower cost. Private schools charge roughly $8,406 more than public
schools. A school with a religious affiliation is approximately $2,376
cheaper, presumably due to subsidies, and a liberal arts college also
charges roughly $416 less. There are no observations close to the
origin, so there is no direct interpretation of the intercept. Other than
perhaps the coefficient on liberal arts colleges, all coefficients have
the expected sign.
b.7,311.17 + 3,985.20×4.5 – 0.20×1500
+ 8,406.79×1 – 416.38×1 – 2,376.51×0=$ 32,935
c.Roughly $ 12,400. Since over the four years of education, this
implies approximately $50,000, it is a substantial amount of money
for the average household.
d.Using a one-sided alternative hypothesis, the p-value is 6.2 percent. Variables should not be eliminated simply on grounds of a statistical test. The sign of the coefficient is as expected, and its magnitude makes it important. It is best to leave the variable in the regression and let the reader decide whether or not this is convincing evidence that the size of the university matters
e.The critical value for F2,∞ is 3.00 (5% level) and 4.61 (1% level). Hence you cannot reject the null hypothesis in this case
Sooooooooo......... I need help
Answers
what’s the slope of -2,17 and -1,5
Answers
This is because even while adding the rest of the equivalent by the multiple to slope the rest of the fraction.
HELP HELP HELP
The _____ of a linear equation is ax + by = c where a and b are not both zero
A. Run
B. Y intercept
C. Slope intercept form
D. Standard form
Answers
Answer:
it is option D standard form
Which polynomial represents the sum below (x^8 + 2x^4 + 1) + (2x^4 + x^2 + 1)
Answers
To add the polynomials [tex] \tt {x}^{8} + {2x}^{4} + 1 [/tex] and [tex] \tt {2x}^{4} + {x}^{2} + 1 [/tex] let us first combine the like and unlike terms and add them :
[tex] =\tt {x}^{8} + {2x}^{4} + 1 + \tt {2x}^{4} + {x}^{2} + 1[/tex]
[tex] = \tt {x}^{2} + {x}^{2} + {x}^{2} + {x}^{2} + {2x}^{2} + {2x}^{2} + {2x}^{2} + {2x}^{2} + {x}^{2} + 1 + 1 [/tex]
[tex] =\tt {13x}^{2} + 2[/tex]
○=> Therefore :[tex]\color{hotpink} = \tt {x}^{8} + {2x}^{4} + 1 + \tt {2x}^{4} + {x}^{2} + 1 \color{plum}= {13x}^{2} + 2[/tex]
What is the square root of 10000000
Answers
Answer:
The rounded answer is 3162 and the actual answer is 3162.27766017
Step-by-step explanation:
Please give me brainliest. Have a good day. :)
Answer:
the square root of 10000000=√10000000=10^3√10=1000√10=3162.27766
what is the answer please really stuck
Answers
Answer:
X is 30
Step-by-step explanation:
X is 30
23 plus 8 times 2
A quadrilateral ABCD has the given angle measures. Select all measurements which
could come from a cyclic quadrilateral.
A:
angle A is 90°, angle B is 90°, angle C is 90°, and angle D is 90°
B:
angle A is 80°, angle B is 80°, angle C is 100°, and angle C is 100°
C:
angle A is 70°, angle B is 110°, angle C is 70°, and angle D is 110°
D:
angle A is 60°, angle B is 50°, angleC is 120°, and angle D is 130°
E:
angle A is 50°, angle B is 40°, angle C is 120°, and angle D is 150°
Answers
Answer:
A: angle A is 90°, angle B is 90°, angle C is 90°, and angle D is 90°
B: angle A is 80°, angle B is 80°, angle C is 100°, and angle C is 100°
D: angle A is 60°, angle B is 50°, angle C is 120°, and angle D is 130°
Step-by-step explanation:
The sum of opposite angles of a cyclic quadrilateral is 180°
It must satisfy the following:
A+C=180° and B+D=180°
Only choice A and B and D satisfy.
The correct options are options A, B, and D.
What is a cyclic quadrilateral?A quadrilateral having all its corners on a circle plus opposite angles' sum is 180° called a cyclic quadrilateral.
A) ∠A =90°
∠B=90°
∠C =90°
∠D =90°
∠A + ∠C = 180°
∠B + ∠D =180°
So, this quadrilateral can come from a cyclic quadrilateral.
B) ∠A =80°
∠B=80°
∠C =100°
∠D =10 0°
∠A + ∠C = 180°
∠B + ∠D =180°
So, this quadrilateral can come from a cyclic quadrilateral.
Similarly, options C, D, and E also can be checked whether they can come from a cyclic quadrilateral or not.
C) Cannot come from a cyclic quadrilateral since ∠A + ∠C =140°≠180°.
D) ∠A + ∠C = 180°
∠B + ∠D =180°
So, this quadrilateral can come from a cyclic quadrilateral.
E)Cannot come from a cyclic quadrilateral since∠A + ∠C = 170°≠180°.
Therefore, The correct options are options A, B, and D.
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3 1/8 - 7/12 estimate the difference by rounding each fraction or mixed number to the nearest half or whole.
Answers
Answer:
2
Step-by-step explanation:
3-1=2...since the nearest whole number for the first is 3 and that of the next is 1 since it is more than a half
Answer:
2
Step-by-step explanation:
2 its becuse i muitlplyed to get the anserw and subtraction
Khan academy Help please
Answers
Answer:
B, C and F
Step-by-step explanation:
A constant is where a variable or number is on its own
B - 2x-4 (4 is the constant)
C - 8x+y (y is the constant)
F - 7+4x (7 is the constant)
round off 9.999 to the nearest 10
Answers
Answer:
the answer is 10 you round up a nine it keeps going to the end
The diagram shows as scale drawing of a playground
The scale of the drawing is 1:500
Answers
Answer:
45
Step-by-step explanation:
3+1.5+3+1.5=9
9*500=4500
4500/100=45
Andrea uses 8.1 pints of white paint and blue paint to paint her bedroom walls.
4/5 of this amount is white paint, and the rest is blue paint. How many pints of blue paint did she use to paint her bedroom walls
Answers
Answer:
2.025 pints of blue paint
Step-by-step explanation:
4/5 = 80/100 or 80%
8.1 is 80% of 10.125
10.125 is the total pints of paint used.
If 8.1 of those pints of paint are white, then the rest of the paint must be blue.
10.125 - 8.1 = 2.025
Using disks or washers, find the volume of the solid obtained by rotating the region bounded by the curves y=x2, 0≤x≤3, y=9, and x=0 about the y-axis.
Volume =
Answers
Answer:
113.08 cm^3
Volume for sphere = 4/3 Pi 3^3
y = x^2 - (x+0) (x+0)< 3 would equal x = 1.25 and y = 2.5 max
then y = 9 and x = 0 around the y axis
We find (1.25, 2.5) (0,9)
y + 1 = 0 + 1.25 + 9
y+ 1 = 10.25
radius therefore = 3^2 = 3
and surface area = pi x 9 = 28.2743338823
= 28.27cm^2 x 4 = 113.1cm
If it is a sphere you then multiple 4/3 pi r^3 is exactly the same as 4pir^2
Step-by-step explanation:
The volume of the solid is [tex]9\pi[/tex] cubic unit.
Volume of solid :The volume of the solid obtained by rotating the curve [tex]y=f(x)[/tex] is given as,
[tex]V=\int\limits^b_a \pi {y^{2} } \, dx[/tex]
Given that, [tex]y=x^{2} ,a=0,b=3[/tex]
Substitute above values in volume formula.
[tex]V=\int\limits^3_0 \pi{x^{2} } \, dx \\\\V=\pi(\frac{x^{3} }{3} )^{3} _{0}\\\\V=\frac{\pi}{3} (27-0)=9\pi[/tex]
Thus, the volume of the solid is [tex]9\pi[/tex] cubic unit.
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Mr. Cosgrove went out to dinner and the bill came out to $48; he tipped 8%. How
many dollars did Mr. Cosgrove tip?
Answers
Answer:
Amount = $3.84
Step-by-step explanation:
Given the following data;
Total bill = $48
Tip = 8%
To find the amount of dollars tipped?
[tex] Amount = \frac {8}{100} * 48[/tex]
[tex] Amount = \frac {384}{100} [/tex]
Amount = $3.84
Therefore, the amount of dollars Mr. Cosgrove tipped is $3.84.
Use the commutative property to write an expression equivalent to -5d + 1/2.
Answers
Answer:
1/2 + -5d
Step-by-step explanation:
PLS HELP I WILL GIVE BRAINllESTFind the surface area of the rectangular prism.
2 mi
8 mi
1 mi
Answers
Answer:
A=2(wl+hl+hw)
Step-by-step explanation:
7xy^ 2 z-2xz^ 2 +3xy^ 2 (9x-1,y=2 , z=3
Answers
Answer:
I dont know
Step-by-step explanation:
??
