Question

1). Given μ=30 , σ=15 , and n=50, determine μx and σx from the given parameter of the

       population and the sample size n.

A     μx =30 and σx=15                                  B     μx =15 and σx=30

C     μx =30 and σx=2.12                                D     μx 4.24 and σx=2.12

Answer 1

Solution :

Given that ,

mean = = 30

standard deviation = = 15

n = 50

sample distribution of sample mean is ,

=

= 30

sampling distribution of standard 2.122.7

= 2.12