Statistics

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

Tags

CCSS.6.SP.A.2

CCSS.6.SP.A.3

CCSS.6.SP.B.5

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

• 8
• 9
• 13
• 21

Tags

CCSS.HSA-SSE.A.1A

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

• How spread out the numbers are from the mean.

• How much each number in the data set increases by.

• How much each number in the data set decreases by.

Tags

CCSS.6.SP.A.2

CCSS.6.SP.A.3

CCSS.6.SP.B.5

If 160 people were surveyed, how many people are taller than 62 inches?

• 40

• 80

• 100

• 120

Tags

CCSS.3.MD.B.4

Which of the following stats is incorrect?

70, 87, 93, 95, 82, 94

• mean: 86.83

• standard deviation: 8.78

• IQR: 12

• median: 94

Tags

CCSS.6.SP.A.3

CCSS.6.SP.B.5

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%

The z-score represents.....

• the amount of standard deviations a data value is above or below the mean.
• the percentile the data value is above or below the mean.
• the amount of standard deviations a data value is above or below the median.
• the percent the data value is above or below the mean.

Tags

CCSS.HSS.ID.A.4

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 40 yards sprint times for a soccer team are found to be normally distributed with a mean of 5.2 seconds and a standard deviation of 0.3 seconds.  What is the z-score for a player who runs a time of 5.6 seconds?

• -1.33
• 1.33
• 0.88
• 1.02

Tags

CCSS.HSS.ID.A.4

The ages of the population of people living in Meru area in Ipoh 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

Tags

CCSS.HSS.ID.A.4