12. 0/0.033 points | Previous Answers 8.HW. 110. My Notes Ask Your Teacher A mag

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12. 0/0.033 points | Previous Answers 8.HW. 110. My Notes Ask Your Teacher A magazine published data on the best small firms in a certain year. These were firms that had been publicly traded for at least a year, have a stock price of at least $5 per share, and have reported annual revenue between $5 million and $1 billion. The table below shows the ages of the corporate CEOs for a random sample of these firms. 47 59 52 61 55 59 74 63 53 50 59 60 60 5746 55 | 63 57 47 55 57 43 61 6249 67 67 55 55 49 Use this sample data to construct a 90% confidence interval for the mean age of CEO's for these top small firms. Use the Student's t-distribution. (Round your answers to two decimal places.) ( , 58.81 Dx ) 54.51

Explanation / Answer

One-Sample T: data

Test of mu = 0 vs not = 0

Variable N Mean StDev SE Mean 90% CI T P
data 30 56.57 6.94 1.27 ( 54.41, 58.72) 44.63 0.000

90% CI is (54.41, 58.72) . hope this will be helpful. Thanks and God bless you:-)

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