Answer:
Step-by-step explanation:
Answer:
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Step-by-step explanation:
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he National Center for Health Statistics interviewed 5409 adult smokers in 2015, and 2666 of them said they had tried to quit smoking during the past year. Consider this to be a random sample. Find a 95% confidence interval for the proportion of smokers who have tried to quit within the past year. (Round the final answers to three decimal places.) The 95% confidence interval is ( , ).
Answer:
95% confidence interval for the proportion of smokers who have tried to quit within the past year
(0.47956 ,0.50620)
Step-by-step explanation:
Step(i):-
Given that National Center for Health Statistics interviewed 5409 adult smokers in 2015
Sample size 'n' = 5409
Given that 2666 of them said they had tried to quit smoking during the past year.
proportion
[tex]P = \frac{x}{n} = \frac{2666}{5409} = 0.49288[/tex]
Q = 1 - P = 1 - 0.49288 = 0.50712
Step(ii):-
95% confidence interval for the proportion of smokers who have tried to quit within the past year
[tex]({P - Z_{0.05} \sqrt{\frac{PQ}{n} } , P + Z_{0.05} \sqrt{\frac{PQ}{n} )[/tex]
[tex]({0.49288 - 1.96 \sqrt{\frac{0.49288 X 0.50712}{5409} } , 0.49288 + 1.96\sqrt{\frac{0.49288 X 0.50712}{5409} )[/tex]
(0.49288 - 0.01332 , 0.49288+0.01332)
(0.47956 , 0.50620 )
Final answer:-
95% confidence interval for the proportion of smokers who have tried to quit within the past year
(0.47956 ,0.50620)
Please answer or give the steps to answer please please please this is my state test and i can’t fail
Answer:
1. 466.3ft
2. 12.1m
Step-by-step explanation:
1.
Imagine this as a triangle like shown in pic attached, then use tan to find 'x', the distance between the base of the tower and the fire:
tanA=opposite/adjacent
tan25=x/1000
x=100tan25
x=466.3ft
2.
Imagine this as a triangle like shown in pic attached, then use sine to find 'x', the kite's vertical height above the boy's hand:
sinA=opposite/hypotenuse
sin12=x/50
x=50sin12
x=10.4m
The kite's height off the ground is this plus the height of the boy's hand from the ground: 10.4+1.7=12.1m
The x-intercepts of a quadratic
(also called the zeros) occur
when the y-coordinate is [?].
Answer:
0
Step-by-step explanation:
The x-intercepts of a quadratic
(also called the zeros) occur
when the y-coordinate is [0].
That is why the x-intercepts are called zeros.
Answer:
0
Step-by-step explanation:
The x-intercepts of a quadratic
(also called the zeros) occur
when the y-coordinate is 0.
Kim and Steven went to dinner. Kim had a coupon for a 25% discount off the price of all meals, not including tax and tip, if the original price of meals was $75.00, what is the discounted price, not including tax and tip?
Answer:
The discounted price, not including tax and tip is $56.25.
PLEASE HELP ME ASAPPPPPPPPPPPPPPPPPPPPP
One number is equal to the square of another. Find the numbers if both are positive and their sum is 306.
Answer: 17 or -18
Step-by-step explanation:
x^2+x=306
x^2+x-306=0
(x-17)(x+18)=0
x-17=0
x=17
x+18=0
x=-18
..i think this is the right answer
What is an Expression?
Answer:
Hello, an expression are numbers, symbols, and operators grouped to show the value of something. For example, 4+5 and 45/5-2 are expressions.
Step-by-step explanation:
I hope this helped you!
Which term could be put into the blank to create a fully simplified polynomial written in standard form
Answer:
[tex]x^{2} y^{2}[/tex]
Step-by-step explanation:
The method of tree ring dating gave the following years A.D. for an archaeological excavation site. Assume that the population of x values has an approximately normal distribution. 1271 1187 1194 1250 1268 1316 1275 1317 1275 (a) Use a calculator with mean and standard deviation keys to find the sample mean year x and sample standard deviation s. (Round your answers to the nearest whole number.)
Answer:
The sample mean year is 1261 A.D.
The standard standard deviation is of 46 A.D.
Step-by-step explanation:
Sample mean:
Sum of all values divided by the number of values. So
[tex]x = \frac{1271+1187+1194+1250+1268+1316+1275+1317+1275}{9} = 1261.4[/tex]
Rounding to the nearest whole number, the sample mean year is 1261 A.D.
Sample standard deviation:
Square root of the sum of the difference squared between each value and the mean, divided by one less than the sample size. So
[tex]s = \sqrt{\frac{(1271-1261.4)^2+(1187-1261.4)^2+(1194-1261.4)^2+(1250-1261.4)^2+(1268-1261.4)^2+(1316-1261.4)^2+(1275-1261.4)^2+(1317-1261.4)^2+(1275-1261.4)^2}{8}} = 45.8[/tex]
Rounding to the nearest whole number, the standard standard deviation year is of 46 A.D.
if a 4.0 cm X 5.5 cm photo is enlarged so that is length is 8.5 what s the new width?
Answer:
6
Step-by-step explanation:
On the number line, plot and label all numbers with an absolute value of 32. Where did you place the points?
Answer:
on 32 and -32
Step-by-step explanation:
what’s the domain of this relation?
Answer:
there is nothing here but thanks for the points
Step-by-step explanation:
Have a great rest of your day/night!
Help please ASAP I have to have this done In the hour
Answer:
A. 1,2,3,4
B. 1,2,3
C. 5 and up
D. $30
Step-by-step explanation:
calculate the reciprocal of -0.07 correct to 1 decimal place
Answer:
-14.3
Step-by-step explanation:
Use a calculator.
1/(-0.07) = -14.2857...
Answer: -14.3
Which of the following conversions is correct?
A. 1 cup is equivalent to 2 pints.
B. 4 pints is equivalent to 1 quart.
C. 1 gallon is equivalent to 128 fluid ounces.
D. 1 quart is equivalent to 8 cups.
Answer:
C. 1 gallon is equivalent to 128 fluid ounces.
Step-by-step explanation:
63°
13°
Choose the equation that best describes the image
Answer:
63degrees
Step-by-step explanation:
I cant see the picture well but i assume that is an angle and it is right before 90 degrees
Write the slope-intercept form of the equation for the line passing through the given pair of points. (-9, 0) and (6, 4)
explain please show work
PLEASE HELP!!!!!Find the equation of each line and then put each equation into the form Ax+By=C where A,B, and C are integers
through(-3,2) and parallel to the line joining (2,3) and (1,-2)
Answer:
y-5x-7=0
Step-by-step explanation:
m = -2-3/1-2
m=5
y-y1 = m(x-x1)
y-2=5(x+3)
y-2=5x +5
y-5x-7=0
Imagine you are the teacher. Explain how you would walk your student through this problem to answer this problem step by step.
Two hikers leave a cabin at the same time, one heading due south and the other headed due west. After one hour, the hiker walking south has covered 2.8 miles and the hiker walking west has covered 3.1 miles. At that moment, what is the shortest distance between the two hikers?
Answer:
Due south and due west form a right angle, and the shortest distance between any two points is a straight line. Therefore, we can apply the Pythagorean theorem and write:
3.12+2.82=x2
Here, you will need to use a calculator to simplify the left-hand side:
17.45=x2
Now use your calculator to take the square root. You will likely need to round your answer.
x=17.45−−−−√≈4.18 miles
As you can see, it will be up to you to determine that a right angle is part of the situation given in the word problem. If it isn’t, then you can’t use the Pythagorean theorem.
Step-by-step explanation:
this is my explanation
Bradley's bike has an odometer, which shows how far he rides. Bradley rode 2.7 miles on
Monday, 2.4 miles on Tuesday, and 2.8 miles on Wednesday.
How many days did Bradley ride more than 2 miles?
Answer:
7.9
Step-by-step explanation:
I added 2.7 + 2.4 + 2.8, lmk if it's wrong.
Does anyone know?????
Answer:
The answer is B
Step-by-step explanation:
The reason for this is that for every hour, the person earns another $7.25. In 2 hours, this is $14.50, and at the 2 hour mark, only chart B is at that y-coordinate.
What is the missing length?
10 km
2
area = 33 km
Factor this trinomial completely.
15x2 + 11x - 12
A. (x + 4)(15x - 3)
B. (3x + 3)(5x – 4)
C. (x+3)(15x - 4)
O D. (3x + 4)(5x – 3)
Answer:
D
Step-by-step explanation:
3x * 5x = 15x^2
3x * -3 = -9x
4*5x = 20x
4 *-3 = 12
so 15x^2 +(20x -9x) -12 or 15x^2 +11x -12
Can someone help me :(
Answer:
27/64
Step-by-step explanation:
(3/4)^3 = 27/64
a=5 (the fifth try) The amount of time Chip took to run through the maze on the 5th try can be modeled by t = 0.5a2 - 9a + 48.5 where t = time in seconds. Variable a=5, and then calculate the time t. Compare your time to others. Is it higher or lower? Why?
Answer:
lower
Step-by-step explanation:
Find 0% of 48:
Find 100% of 48:
Find 50% of 48:
Find 25% of 48:
Find 75% of 48:
Answer:
0
48
24
12
36
Step-by-step explanation:
Find the measure of <5.
45 = [?]
699
45
Enter
Answer:
Step-by-step explanation:
Answer:
Solution given:
<5+69°=180°[co- interior angle]
<5=180°-69°=111°
<5=111°
What is the starting term of 64?
Answer:
1
Step-by-step explanation:
One is the starting term
1, 2, 4, 8, 16, 32, 64, 128, 256,
An isotope of the element seaborgium has a half-life is 30 seconds. How much would there be left after one minute if we started with 4 pounds? Show all your work.
Answer:
Step-by-step explanation:
giving brainliest *easy*!!
Answer:
452.16 square yards
Step-by-step explanation:
The equation for the SA of a sphere is A=4πr2
Substituting r = 6 yards : A= 4 * 3.14 * 6^2 = 452.16 square yards
Answer:
452.16
Step-by-step explanation:
