Question

An 10 test is designed so that the mean is 100 and the standard deviation is 10 for the population of normal adults. Find the sample size necessary to estimate the mean score of statistics students such that it can be said with 95% confidence that the sample mean is within 610 points of the true mean. Assume that a 10 and determine the required sample size using technology. Then determine if this is a reasonable sample size for a real world calculation The required samploo (Round up to the nearest integer)

Answer 1

A grum margin of Emon (E) = 6 Pabulalom stole de jalon () = confidere level 954 At ast confidence R1-0.95 0.05 92 -0.005 Z(0.005): 1.96 [wing 2 table mangin of Erion E)= ZE12) Shah 6 [vering given 6 so scumple size ZE12) in E 1.96 x 10 11 So, on Required Sample size ma 11