Question

Construct a 95% confidence interval to estimate the population mean using the data below. X = 39 o= 10 n=43 With 95% confidence, when n = 43 the population mean is between a lower limit of and an upper limit of (Round to two decimal places as needed.)

Answer 1

Here ginen n=43 X = 39 =10 consider, Ci-) 100.. - 95). 1-d30.95 d=0:05 by using standard normal table Zal2 = =1.96 NOCO, confidence interval 61 jo 5 + 24/2.6) ſn (7 - 2012 =-( 39–196x 10 39+1ig6 x 10 1403 143 sposo 41.99 1.) ( 36.01 :99) Ans: with gst confidence, when n = 43 the popuation mean is between a lower limit of 36.01 and upper limit of 41.99