(Solved by Humans)-A researcher wants to know if the mean times (in minutes) that

Question

A researcher wants to know if the mean times (in minutes) that people watch their favorite news station are the same.

Suppose that?Table 13.24?shows the results of a study..

CNN??????? FOX ??????????? Local
45???????????? 15??????????????? 72

12????????????? 43?????????????? 37?

18????????????? 68??????????????? 56

38?????????????? 50?????????????? 60

23??????????????? 31?????????????? 51

35? ????????????? 22

Assume that all distributions are normal, the four population standard deviations are approximately the same, and the data
were collected independently and randomly. Use a level of significance of 0.05.
?(which I did below) what I need help with is questions a - i

• H0: _______
• Ha: _______
• In words, CLEARLY state what your random variable X bar or P? represents.
• State the distribution to use for the test.
• What is the test statistic?
• What is the p-value? In one or two complete sentences, explain what the p-value means for this problem.
• Use the previous information to sketch a picture of this situation. CLEARLY, label and scale the horizontal axis and shade the region(s) corresponding to the p-value.
• Indicate the correct decision (?reject? or ?do not reject? the null hypothesis), the reason for it, and write an appropriate conclusion, using complete sentences

Alpha: _______

???? Decision: _______

???? Reason for decision: _______

???? Conclusion: _______

• Construct a 95% confidence interval for the true mean or proportion. Include a sketch of the graph of the situation. Label the point estimate and the lower and upper bounds of the confidence interval.