Statistical Inferences

Question 1

A simple random sample of ten people is taken from the set of all registered voters in a given district to determine their average age. Which of the following is a reason why you can not make a statistical inference on the population?

Revolt · Accepted Answer

A: The sample size is not appropriate.; B: The population isn’t given to be approximately normal.

Question 2

Between 7.3 and 8.7 hours of sleep:

Revolt · Accepted Answer

A: 90% confidence level

Question 3

Between 7.2 and 8.8 hours of sleep:

Revolt · Accepted Answer

B: 95% confidence level

Question 4

Assuming a 90% confidence level, the margin of error is approximately

Revolt · Accepted Answer

D: 0.3.

Question 5

Assuming a 90% confidence level, the margin of error is approximately

Revolt · Accepted Answer

D: 0.3.

Question 6

A convenience sample of forty people is taken from a population. Which of the following is a reason why you can not make a statistical inference on the population?

Revolt · Accepted Answer

D: The wrong sampling method was used.

Question 7

Between 7.0 and 9.0 hours of sleep:

Revolt · Accepted Answer

C: 99% confidence level

Question 8

Which confidence interval is most likely to contain the population parameter?

Revolt · Accepted Answer

B: between 7.0 and 9.0 hours of sleep

Question 9

Which of the following gives the confidence interval?

Revolt · Accepted Answer

C: between 20.3 and 20.9

Statistical Inferences Answers

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