A swim instructor would like to test the effect of a new swim technique versus the standard technique for a group of 25 competitive swimmers.

The swim instructor divides the students by class (junior or senior), and then randomly allocates half of the 14 juniors and 5 of the 11 seniors to receive instruction on the new technique.

During swim practice, the instructor times the juniors as they race against each other to see if those who learned the new technique outperform their peers. The instructor does the same for the seniors.

At the end of practice, the instructor compares the average swim time for both juniors and seniors among those who did and did not use the new technique.

A) The instructor should place the 25 student names on slips of paper and place them in a hat. Twelve of the slips should be drawn out and those students should receive the instruction on the new technique.

B) The instructor should place the names of the 14 juniors on slips of paper and place them in one hat. The 11 seniors’ names should be placed on slips of paper and placed into a separate hat. The instructor should randomly select 7 juniors and 5 seniors to receive instruction on the new technique.

C) For each student, the instructor should flip a coin. If the coin lands on heads, the student will receive instruction on the new technique. If the coin lands on tails, the student will not receive instruction on the new technique.

D) The students should line up alphabetically and count off by 2s. Every student who gets a 1 will receive instruction on the new technique. Every student who gets a 2 will not receive instruction on the new technique.

Answer:

B on Edge 2021.

Step-by-step explanation:

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Answer:randomized block experimental design

Step-by-step explanation:

CORRECT ON EDGE 2022

teacher already gave the answer she wants me to figure out how she got the answer. please help if another boy sends me a link I am going to have a melt down ​

find the lateral surface area​

8th grade math !!
g(x) = x+6/2
Determine for each x-value whether it is in the domain of g or not.
-6
0
2

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tan() = -1
If & is an angle in quadrant II, what is the value of sin()?
ΟΑ. .
5734
34
5734
34
ОВ.
O c.
3V34
34
3V34
34
D.

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B. x^2 - 12x = 36
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Please explain ​

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Um motor elétrico recebe 2.800 kJ de energia elétrica. Transforma 900 kJ em energia térmica, 150.000 J em energia sonora e o restante em energia cinética. Podemos afirmar que seu rendimento é de: *
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Someone help?
Wanda feeds her 3 dogs 1/4 of a can of food per meal. She feeds each of her dogs twice a day. If Wanda has 12 cans of food, is it true that she can feed her dogs for at most 6 days?

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the radius of the circle is ___ inches.

use 3.14 for pi. ​

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Consider the equation y=97x+8000, what is the y-intercept?

Item 1
What is the radius of the button?


button is 26
Radius:
mm

Based on the graph, what does the point (2, 60) represent?
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B.
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C.
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(142)² – (58)²

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