Find the Answers bellow: 
1. C, 2. D, 3. D


1. Calculate the sample standard deviation using the following data:

        X 

        4

        5

        2

        6

        4

        3

        4

The standard deviation is which of the following?

A. 10

B. 1.66

C. 1.20

D. 1

2. Using the standardized normal table supplied with this exam determine what Z value would be used to set up a confidence interval at the 99 percent confidence level.

A. .01

B. 1.01

C. 1.65

D. 2.57

3. Using the standardized normal table supplied with this exam determine what Z value would be used to set up a confidence interval at the 95 percent confidence level.

A. .05

B. 1.05

C. 1.65

D. 1.96