Question

Test the claim about the population mean,

muμ ,

at the given level of significance using the given sample statistics. Claim:

muμequals=30

alphaαequals=0.02

sigmaσequals=3.42

Sample statistics:

x overbarxequals=29.5

nequals=66

The standardized test statistic is

nothing.

(Round to two decimal places as needed.)

Answer 1

Solution :

Given that,

Population mean = = 30

Sample mean = = 29.5

Population standard deviation = = 3.42

Sample size = n = 66

Level of significance = = 0.02

The test statistics,

Z = ( - )/ (/)

= (29.5 - 30) / ( 3.42 / 66)

= -1.89