Question

Asked Apr 12, 2019

Critical Values=

Step 1

**Obtain the critical value in case of right tailed hypothesis test**

Here, it is given that the percentage values are normally distributed and the population standard deviation is unknown.

The sample size is *n *= 8.

The claim is that there is drop in the approval rate.

For testing the claim, here a sample of size n =8 was collected. The data is paired data.

Let the mean difference *d*-bar is the average of the differences.

**Hypothesis:**

Therefore the test is a right tailed test.

The critical value corresponding to right tailed test is obtained as 1.895 from the calculation given below:

Step 2

**Obtain the critical value in case of two tailed hypothesis test:**

Here, it is given that the percentage values are normally distributed and the population standard deviation is unknown.

The sample size is *n *= 8.

From the...

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