Question

The difference of sample means of two Populations is 108.7 and the standard deviation of the difference in Sample means is 32. Which stachement is true if we are testing the null hypothesis at the 68%. Confidence level?

Answer 1

Step-by-step explanation:

Given:

The difference of the sample means of two Populations = 108.7

the standard deviation of the difference in sample means = 32

To find:

the statement that is true if we are testing the null hypothesis at the 68% Confidence level

First, we need to find the z-score from the given information:

`\begin{gathered} Z_-score\text{ = }\frac{mean\text{ difference}}{standard\text{ devaition}} \\ Z-score\text{ = }(108.7)/(32) \\ Z-score\text{ = 3.397; approx. 3.4} \end{gathered}`