THESE ARE WHAT I NEED HELP WITH A Calculate the EBM B What i

THESE ARE WHAT I NEED HELP WITH:

A) Calculate the EBM:

B) What is the lower bound to this confidence interval?

C) What is the upper bound to this confidence interval?

(A)The EBM is z0.90*(standard deviation/root over n)

=1.645*(7/10)

=1.1515

B)The lower bound is: 23.6-1.1515=22.4485

C)The upper bound is: 23.6+1.1515=24.7515