Statistical Inferences

Question 1

What range of values shows the confidence interval for the study?

Revolt · Accepted Answer

B: 149.61 to 150.39

Question 2

Question 2

Revolt · Accepted Answer

C

Question 3

What is the margin of error, assuming a 90% confidence level? Round your answer to the nearest tenth.

Revolt · Accepted Answer

PENDING

Question 4

You are told that in a sample of size 225 the mean is 48.5 and the standard deviation is 1.8. The study is reported with 90% confidence level. Explain how to determine if 48.8 is within the confidence interval.

Revolt · Accepted Answer

To find the margin of error, multiply the z-score by the standard deviation, then divide by the square root of the sample size. The z*-score for a 90% confidence level is 1.645. The margin of error is 0.20. The confidence interval is 48.3 to 48.7. 48.8 is not within the confidence interval.

Question 5

A confidence level of 95% means:

Revolt · Accepted Answer

B: 95% of the time, population data will fall between 149.61 and 150.39.

Question 6

The margin of error for a 95% confidence level will be

Revolt · Accepted Answer

A: greater than 0.3.

Question 7

Which of the following did you include in your explanation?

Revolt · Accepted Answer

PENDING

Statistical Inferences Answers

More from this Course

TRY EDGENUITY HACKS