Question

A simple random sample of 70 items from a population with o 9 resulted in a sample mean of 39 If required, round your answers to two decimal places. a. Provide a 90% confidence interval for the population mean. to b. Provide a 95% confidence interval for the population mean. to c. Provide a 99% confidence interval for the population mean. to

Answer 1

Giren, n = 70 mean x= 39 ve Enow that, confidence interval for pop. mean is CF-24/2 20 X + Z112 ) 0 consider, (1-0)100 : gois. C1-) = 0.go doo 42 = 0.05 got. confidence intread interval for pop. mean is (89–1848 pinoy , 39+ 16071) ( 89 - 1:7641 , 39 + 1.7601) ( 37.2358, 40.7641) [37. 24 to 40.76]

(1-) 100-957 de 0105 Os confidence interval for population mean C 09- 1.96 * .39 +1.96*) (36.89 , 41.11) 36:39 +0 4.50] © (1-0) 100 f = 991. confidence interval for the pop. . g - 2.58 mean is (99 - 2:58x , 99 +255 * ) ( 36.23 , 41.78) [ 36.28 to [41.78] 6.23 41:78