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Anna [14]
3 years ago
7

Question...Sleep is known to affect student grades. Kirsten is conducting a study in a local high school using two treatments on

two groups of students. One group will nap one hour in an eight-hour school day and another will nap 30 minutes in an eight-hour school day. What group would be the best control for the study?
Options...
A third group that takes a one-hour nap or a 30-minute nap randomly each day

A third group that shortens the school day to six hours

A third group in which no naps occur

A third group that splits the day with a 30-minute nap in the morning and a 30-minute nap in the afternoon

A third group in which each student chooses either a 30-minute nap or a one-hour nap
Mathematics
1 answer:
OLga [1]3 years ago
4 0

Answer:

c

Step-by-step explanation:

a third party group in which no naps occur

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20 4/7 inches

Step-by-step explanation:

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Rufina [12.5K]

Answer:

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Step-by-step explanation:

Let's define the sets.

Let ¢ = universal set ( Contains all the elements in the set)

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Anna35 [415]

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x^2y^2 3y^2

Step-by-step explanation:

its a or the first choice

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3 years ago
How do u guys do a step by step explanation on this app sorry I’m new
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Step-by-step explanation:

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