Pre-Assessment Unit 9 Data Analysis

Calculate the mean and median for the data set: 6, 7, 12, 8, 7, 4, 8, 8, 7

• mean: 7 median: 7

• mean: 7.44 median: 8

• mean: 7 median: 7.44

• mean: 7.44 median: 7

33, 25, 42, 25, 31, 37, 46, 29, 38
What is the interquartile range of the data?

• 8
• 9
• 13
• 21

What does the standard deviation tell us about the data set?

• How spread out the numbers are

• How much each number in the data set increases by

• How much each number in the data set decreases by

If 160 people were surveyed, how many people were are least 60 inches tall?

• 40

• 80

• 100

• 120

Tags

CCSS.2.MD.D.9

Which of the following stats is incorrect?

70, 87, 93, 95, 82, 94

• mean: 86.83

• standard deviation: 8.78

• IQR: 12

• median: 94

The shelf life of a particular dairy product is normally distributed with a mean of 12 days and a standard deviation of 3 days.

About what percent of the products last between 9 and 18 days?

• 68%

• 34%

• 81.5%

• 13.5%

Fernando is 60 inches tall. The average height for his age and gender is 68 with a standard deviation of 10 inches. If the average height of males is normally distributed, what percent of his peers are shorter than him?

• 46.81%

• 8%

• 78.81%

• 21.19%

The ages of the population of people living in Matteson area are normally distributed with mean 43 and standard deviation 14. If the population is 5,000, how many would you expect to be older than 57?

• 2,500

• 4,200

• 800

• 3,400

95% of test scores are between 74 and 92. Assuming this data is normally distributed, choose the correct mean and standard deviation.

• mean: 83

• mean: 85

• standard deviation: 9

• standard deviation: 4.5

68% of students at school weigh between 64 kg and 88 kg.

Assuming this data is normally distributed, what is the percentile of a student that weighs 82 kg?

• 75%

• 77.34%

• 22.63%

• 69.15%