Chapter 9 Problem 13.xlsx

# Chapter 9 Problem 13.xlsx - BA 6933 Statistics and...

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BA 6933 Statistics and Quantitative Methods Chapter 9 Problem 13 a sample size n = 60 sample mean = 52.5 The population standard deviation = 8 The hypotheses to be tested are: m 50 m > 50 The test statistics for hypothesis tests about population mean is given as: = 52.5-50 / 8 / 60 = 2.42 Therefore, for a upper tail test the critical value is the value of the test statistic that will correspond to th Using standard normal probability table, the results are z= 1.645 provides an area of 0.05 in the upper Therefore, the critical value rejection rule for a level of signifance of 0.05 is Reject H0 if z > 1.645 This is because 2.42 > 1.645, we can reject the null hypothesis at the 0.05 level of signifance. b sample size n = 60 sample mean = 51.5 The population standard deviation = 8 The hypotheses to be tested are: m 50 m > 50 The test statistics for hypothesis tests about population mean is given as: = 51-50 / 8 / 60 = 0.97 Therefore, for a upper tail test the critical value is the value of the test statistic that will correspond to th

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