Chapter 7.1-7.3 Practice

Chapter 7.1:

You are told that Mr. J is 95% confident that the true mean midterm score lies between 75 and 85. State the margin of error.

• 10

• 5

• 80

• 160

Tags

CCSS.HSS.IC.B.4

Chapter 7.1:

Mr. J states with 96% confidence that his estimate of the true average attendance percentage is 87% with a margin of error of 3%. State the confidence interval.

• [84%,90%]

• [85.5%,88.5%]

• [93%,99%]

• [87%,96%]

Tags

CCSS.HSS.IC.B.4

Chapter 7.1:

The Confidence Interval is a range used to help estimate the ________ with a certain level of confidence.

• Sample

• Statistic

• Population

• Parameter

Tags

CCSS.HSS.IC.B.4

Chapter 7.1:

Dr. Crismon claims that the true mean height of his students, in inches, lies between 64inches and 68inches. What would the point estimate be?

• 66 inches

• 64 inches

• 68 inches

• Not enough information

Tags

CCSS.HSS.IC.B.4

Chapter 7.1:

True/False: A confidence interval can only be used to help estimate the mean

• True

• False

Tags

CCSS.HSS.IC.B.4

Chapter 7.2:

In order to decrease the range of the confidence interval we need to ___________ our level of confidence.

• Increase

• Decrease

• do nothing to

Chapter 7.2:

In order to decrease our confidence level we can __________ our confidence interval.

• Increase

• Decrease

• do nothing to

Chapter 7.2:

Which of the following is NOT a source of bias?

• Unresponsive

• Non-Response

• Large Samples

• Leading Questions

Tags

CCSS.HSS.IC.B.3

Chapter 7.2:

How will increasing my sample size change my confidence interval?

• Decreases Range

• Increases Range

• Does not change

Chapter 7.2:

Which of the following is not a possible confidence level?

• 96%

• 50%

• 2%

• 101.9%

Tags

CCSS.7.SP.C.5