Stats Questions?

Posted on 2015-12-04 06:03:00 in Statistics by TANYA

A cell phone company offers two plans to its subscribers. At the time new subscribers sign up, they are asked to provide some demographic information. The mean yearly income for a sample of 40 subscribers to Plan A is $59,100 with a standard deviation of $9,200. This distribution is positively skewed; the actual coefficient of skewness is 2.15. For a sample of 30 subscribers to Plan B the mean income is $63,000 with a standard deviation of $7,100. The distribution of Plan B subscribers is also positively skewed, but not as severely. The coefficient of skewness is 1.68. Assume that the population variances are unequal.

At the .01 significance level, is it reasonable to conclude the mean income of those selecting Plan B is larger? Hint: For the calculations, assume the Plan A as the first sample.

a. The test statistics is
b. The decision is to reject or not to reject the null hypothesis that the means are the same?
c. The p value is?
d. Do the coefficients of skewness affect the results of the hypothesis test?

---

Answer Comment

No Answers Posted Yet.