1. Given the following data, what is the sample size? Express your answer into 2 decimal places.

Mean = 80

Standard deviation = 10

Margin of error = 3.1

Confidence level = 95%

2. Given the following data, what is the upper bound of the confidence interval? Express your answer into 2 decimal places.

Mean = 65

Standard deviation = 10

Sample size = 100

Confidence level = 95%

3. Given the following data, what is the confidence coefficient? Express your answer into 2 decimal places.

Mean = 65

Standard deviation = 10

Sample size = 100

Confidence level = 95%

4. Given the following data, what is the Margin of Error? Express your answer into 2 decimal places.

Mean = 88

Standard deviation = 20

Sample size = 100

Confidence level = 90%