Here are summary statistics for randomly selected weights of newborn girls: n=36, x=3227.8

g, s=686.4 g. Use a confidence level of 95% to complete parts (a) through (d) below.

A. Identify the critical value t/2 used for finding the margin of error.

t/2=___ (Round to two decimal places as needed.)

Part 2

B. Find the margin of error.

E=____ g(Round to one decimal place as needed.)

Part 3

C. Find the confidence interval estimate of .

____g<<____g (Round to one decimal place as needed.)

Part 4D.

Write a brief statement that interprets the confidence interval. Choose the correct answer below.

A. One has 95% confidence that the sample mean weight of newborn girls is equal to the population mean weight of newborn girls.

B. There is a 95% chance that the true value of the population mean weight of newborn girls will fall between the lower bound and the upper bound.

C. Approximately 95% of sample mean weights of newborn girls will fall between the lower bound and the upper bound.

D. One has 95% confidence that the interval from the lower bound to the upper bound contains the true value of the population mean weight of newborn girls.