Here are summary statistics for randomly selected weights of newborn girls: n=36, x=3227.8 g, s=686.4 g. Use a co a. Identify the critical value ta/2 used for finding the margin of error. ta/2= (Round to two decimal places as needed.) b. Find the margin of error. E=g (Round to one decimal place as needed.) c. Find the confidence interval estimate of μ. g<μ

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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 90% to complete parts (a) through (d) below.
a. Identify the critical value tα/2 used for finding the margin of error.
ta/2
(Round to two decimal places as needed.)
b. Find the margin of error.
=
E= g
(Round to one decimal place as needed.)
c. Find the confidence interval estimate of μ.
g<μ<
Πα
g
(Round to one decimal place as needed.)
d. Write a brief statement that interprets the confidence interval. Choose the correct answer below.
O A. Approximately 90% of sample mean weights of newborn girls will fall between the lower bound and the upper bound.
B. One has 90% confidence that the interval from the lower bound to the upper bound contains the true value of the population mean weight of newborn girls.
C. One has 90% confidence that the sample mean weight of newborn girls is equal to the population mean weight of newborn girls.
D. There is a 90% chance that the true value of the population mean weight of newborn girls will fall between the lower bound and the upper bound.
Transcribed Image Text: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 90% to complete parts (a) through (d) below. a. Identify the critical value tα/2 used for finding the margin of error. ta/2 (Round to two decimal places as needed.) b. Find the margin of error. = E= g (Round to one decimal place as needed.) c. Find the confidence interval estimate of μ. g<μ< Πα g (Round to one decimal place as needed.) d. Write a brief statement that interprets the confidence interval. Choose the correct answer below. O A. Approximately 90% of sample mean weights of newborn girls will fall between the lower bound and the upper bound. B. One has 90% confidence that the interval from the lower bound to the upper bound contains the true value of the population mean weight of newborn girls. C. One has 90% confidence that the sample mean weight of newborn girls is equal to the population mean weight of newborn girls. D. There is a 90% chance that the true value of the population mean weight of newborn girls will fall between the lower bound and the upper bound.
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