Statistics Quiz Review

How many students were greater than or equal to 60 inches tall?

• 21
• 11
• 17
• 6

How many students spent 7 hours doing homework that week?

• 1
• 3
• 5
• 6

When finding median and the middle has two numbers instead of one, what do you do?

• Take the higher number
• Take the lower number
• Take both
• Take the average

This data is normally distributed.  What percent of the data is in the shaded region?

• 68%
• 95%
• 99.7%
• 50%

What shape is a normal distribution curve?

• Half curve
• Round curve
• Bell curve
• Square curve

Find the mean, median, and mode of the data below. Round to the nearest tenth where necessary:

81, 84, 85, 90, 90, 90, 92

• Mean: 87.4 Median: 90 Mode: 90&84

• Mean: 612 Median: 90 Mode: 90

• Mean: 87.4 Median: 90 Mode: 90

• Mean: 87.4 Median: 87.5 Mode: 90

What is the mode of the scores?

• 24
• 14
• 34
• 30

How many baseballs were thrown 50 or more feet?

• 5
• 4
• 13
• 8

How many people watched more than 25 hours of TV last week?

• 0
• 10
• 38
• 42

Find the IQR (interquartile range) using the following information.
Minimum:  77
Q1:  79.5
Median:  86.5
Q3:  90.5
Maximum:  99

• 86.5
• 22
• 90.5
• 11