Past experience indicates that the monthly long-distance telephone bill is normally distributed with a mean of 21.29 dol

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Past Experience Indicates That The Monthly Long Distance Telephone Bill Is Normally Distributed With A Mean Of 21 29 Dol 1 (40.17 KiB) Viewed 21 times

Past experience indicates that the monthly long-distance telephone bill is normally distributed with a mean of 21.29 dollars and a standard deviation of 2.88 dollars. After an advertising campaign aimed at increasing long-distance telephone usage, a random sample of 25 household's bills was taken. The data (in dollars) is below. 15.28 24.24 29.3 16.77 27.06 29.27 20.08 30.22 15.02 17.38 21.17 23.92 17.21 15,65 29.89 27.53 23.94 30.28 21.77 22,39 21.46 15.43 23.52 18.14 18.34 Can we conclude at the 3% significance level that the campaign was successful? Fill in the requested information below. A. The value of the standardized test statistic: B. The p-value is C. Your decision for the hypothesis test: A. Reject H. B. Do Not Reject H. C. Reject H - D. Do Not Reject Ho