Chapter 7 Section 3

If the sample means are 3, 6, 6, 9, and 12 what is the mean of the sample means?

• 6

• 6.5

• 7

• 7.2

• 8.1

Tags

CCSS.6.SP.B.5C

If the population mean is 62.5, what is the mean of sample means taken 5 with replacement?

• 62.5

• 60

• 12.5

• cannot be identified

A beverage company wanted to see if people in the United States liked their new logo. Which choice best represents a population?

• A selection of logo artists.

• Every person in the United States.

• A selection of shoppers from different states.

• 3,800 children age 5 - 15

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.3

A musician wanted to see what people who bought his last album thought about the songs. Which choice best represents a sample? .

• Every person who bought the album.

• A selection of people who didn't want to buy the album.

• 250 girls who bought the album

• A selection of 3,294 people who bought the album.

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.3

The average speed of 1500 vehicles traveled on a stretch of highway that day is 67 miles per hour with a standard deviation of 3.5 miles per hour. If 100 vehicles are randomly selected as samples, what would be the standard deviation of the resulting sampling distribution of sample means?

• 0.52

• 0.43

• 0.35

• 0.25

A population has a mean of 60 and a standard deviation of 5. A random sample of 16 measurements is drawn from this population. Describe the sampling distribution of the sample means by computing its standard deviation.

• 5.00

• 3.75

• 2.50

• 1.25

The 300 customers who called the call centre spend an average of 45 minutes on hold, with a standard deviation of 12 minutes. What is the expected average of the sampling distribution for a sample of 150 randomly selected customers?

• 33

• 45

• 57

• 69

The 300 customers who called the call center spend an average of 45 minutes on hold, with a standard deviation of 12 minutes. What is the standard deviation of the sampling distribution for a sample of 150 randomly selected customers?

• 0.70

• 0.98

• 0.58

• 0.49

The heights female college students are normally distributed with mean of 68 inches and standard deviation of 3 inches. If 25 students are randomly drawn from the population, what would be the expected mean of the resulting sampling distribution of the means?

• 68

• 59

• 40

• 31

David's iPod has 10,000 songs. The distribution of the play times is heavily skewed right with a mean of 225 seconds and a standard deviation of 60 seconds. If we chose an SRS of 10 songs, what is the mean of the sampling distribution?

• 10 seconds

• 22.5 seconds

• 225 seconds

• 2, 250 seconds