Stat - Review for Chap 2 Test

What is the shape of this distribution?

• skewed left

• skewed right

• symmetric

What is the best measure of center for this distribution?

• mean

• median

• mode

• range

What is the best measure of variability for this distribution?

• IQR

• standard deviation

• maximum

• mode

Which of the following has the GREATEST standard deviation?

• GRAPH A

• GRAPH B

• GRAPH C

• GRAPH D

On average, you make $22 a week doing chores with a standard deviation of s = $7. Your parents decide they want to double your chore allowance. What will the new mean and standard deviation be?

• mean = 22; s = 7

• mean = 44; s = 7

• mean = 22; s = 14

• mean = 44; s = 14

On average, you make $22 a week doing chores with a standard deviation of s = $7. Your parents decide they want increase your chore allowance by $8. What will the new mean and standard deviation be?

• mean = 22; s = 7

• mean = 30; s = 7

• mean = 22; s = 15

• mean = 30; s = 15

You collected data on the number of hours of sleep students at PHS got last night. Here is the five number summary: 4, 6, 7, 7.5, 9.5. If you surveyed 60 students, how many got less than 7.5 hours of sleep last night?

• 15 students

• 25 students

• 45 students

• 75 students

Which of the following should be used for symmetric distributions?

• mean and standard deviation

• mean and IQR

• median and standard deviation

• median and IQR

The median of a set of data is 124 and the mean is 102. What can you assume about the shape of the distribution?

• It is skewed left.

• It is skewed right.

• It is symmetric.

• It is uniform.

What is the IQR of the following data set:

4, 5, 6, 8, 9, 10, 11

• 5

• 6

• 7

• There is not enough information

Tags

CCSS.7.EE.B.3