Question

Brittany surveyed the students in three different Chemistry classes regarding the average number of hours of sleep they get each night. She calculated the mean and standard deviation, SD, of the data and recorded the results in the table below.

Class A
Mean = 7.35
SD = 2.92

Class B
Mean = 6.87
SD = 3.65

Class C
Mean = 8.14
SD = 3.10
Use the information provided to complete the following statement.

Class ( A, B, C) shows the most consistency in the number of hours slept per night because the(standard deviation, mean) is the (highest, lowest).

Answer 1

Answer:A standard deviation lowest

Explanation:

Answer 2

Class A shows the most consistency in the number of hours slept per night because the standard deviation is the lowest.

Explanation:

The standard deviation of a set measures how close the measures of this set are, that is, how consistent they are.

The lesser the standard deviation is, the higher the consistency is.

In this problem, we have that:

Class A has the lowest standard deviation.

So:

Class A shows the most consistency in the number of hours slept per night because the standard deviation is the lowest.