Mean = 5.40 and standard deviation = 2.30

1. Calculate standard error for each of the sample sizes

a) Standard error for n= 100

b) Standard error for n=250

c) Standard error for n= 500

d) Standard error for n=1000

2. Find confidence interval using formula for 95% confidence Interval

a) CI for n=100 (use 1.96 value and you will get 2 values- below and above the given mean

b) CI for n=250

c) CI for n=500

d) CI for n=1000

3. Find confidence interval using formula for 99% confidence interval

a) CI for n=100 (use 2.58 value and you will get 2 values- below and above the given mean

b) CI for n=250

c) CI for n=500

d) CI for n=1000