Question

For the United States, the mean monthly Internet bill is $64.79 per household (CNBC, January 18, 2012). A sample of 50 households in a southern state showed a sample mean of $60.63. Use a population standard deviation of σ = $5.60

Formulate hypotheses at the α = 0.01 significance level for a test to determine whether the sample data support the conclusion that the mean monthly Internet bill in the southern state is less than the national mean of $64.79.

SHOW WORK SO I KNOW THE STEPS YOU TOOK TO FIND THE ANSWER.

1. State the null and alternative hypothesis

2. what type of test is this , two tailed, right tailed or left tailed?

3. Is this a z-test or a t-test? why?

4. Compute,

Std err, critical value, test value, and p-value

5. Do you reject or fail to reject the null hypothesis. Explain why. Use the α = 0.01

Answer 1