Question

In: Statistics and Probability

Riverbend City online news advertises that it is read longer than the national news. The mean...

Riverbend City online news advertises that it is read longer than the national news. The mean for national news is 8 hours per week. The following sample of the Riverbend City online news readers is: 5, 7, 6, 2, 4, 8, 5, 4, 18, 21, 8, 7, 4, 5, 6.

a. State the nondirectional hypothesis. Riverbend City online does not read for 8 hours

b.     State the critical t for a = .05 (two tails).

c.     Answer the following: Is the length of viewing for Riverbend City online news significantly different than the population mean? Explain.

d. Calculate the 95% confidence interval with population mean of 8.

**Need help with b, c, d and is a correct?

Solutions

Expert Solution

a.

If we read the problem statement a seems to be wrong.

It is directional.

It is right tail test.

But as mention above I have solve it using non directional hypothesis.

As we fail to reject H0 at 5 % los, we conclude that the length of viewing for Riverbend City online news is not significantly different than the population mean

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orchestra answered 2 years ago
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