Quiz 4

Question 0

When “sample size” increases what happens to the width of the confidence interval:

a) increases
b) decreases

Answer 0

b) confidence interval decreases with an increase in sample size

Question 1

Decreasing “confidence level” causes the width of the “confidence interval” to __________.

a) increase
b) decrease

Answer 1

b) decrease

Question 2

Name the 2 steps in determining sample size:

Answer 2

1. Determine Z

2. Solve for sample size

Question 3

How would one decrease “margin if error?”

Answer 3

Increase “sample size”

Question 4

What is the result of having an outlier within our sample?

Answer 4

The mean is pulled in the direction of the outlier.

Question 5

What happens to the standard deviation when our sample contains an outlier?

a) Std. Deviation increases
b Std. Deviation decreases

Answer 5

a) Std. Deviation will increase

Question 6

What happens to the width of the “confidence interval” when our sample contains an outlier?

a) confidence interval increases
b) confidence interval decreases

Answer 6

a) the confidence interval will increase