distributed. Complete parts (a) through (c) on the right. 10.30 8.81 30.91 19.80

Question

distributed. Complete parts (a) through (c) on the right. 10.30 8.81 30.91 19.80 29.80 5.20 14.86 4.86 27.10 20.46 17.50 8.09 16.51 14.90 15.35 15.42 10.30 33.67 9.72 18.30 (a) Find the sample mean. The sample mean is 17.09 Round to two decimal places as needed.) (b) Find the sample standard deviation. The sample standard deviation is 7.97 Round to two decimal places as needed.) (c) Construct a 99% confidence interval for the population mean . The 99% confidence interval for the population mean ? isGO). Round to two decimal places as needed.) Clear All

Explanation / Answer

following information has been generated using ms-excel

(1-alpha)*100% confidence interval for population mean=sample mean±t(alpha/2,n-1)*sd/sqrt(n)

99% confidence interval for population mean=mean±t(0.01/2, 19)*sd/sqrt(n)=16.99±2.86*7.98/sqrt(20)

n 20 mean=sum/n= 16.99 s 7.98 sum 339.86

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