A survey of 60 married couples (or 7 years or longer) found that that they have an average of 2.27 average children with a standard deviation of 1.22.

Find the following:

a) Find the best point estimate for average children.

b) Construct a 90% confidence interval for the population mean.

i) what is the critical value you used in the formula (this must come from the tables from our textbook)

ii) what is your margin of error

iii) What is your lower bound

iv) What is your upper bound

c) Interpret your confidence interval

All Answers should be to 3 decimals.