Birth weights. The birth weights of males born full-term are normally distributed with mean ? = 3.4 kilograms and standard deviation ? = 0.5 kilograms. A large city hospital selects a random sample of 15 full-term males born in the last six months. a. Calculate the mean and standard deviation of the sampling distribution of x̄ for SRSs of size 15. Mean = Standard deviation = b. Interpret the standard deviation from part (a). c. Find the probability that the sample mean weight is greater than 3.55 kilograms. [ Hint: Determine if the distribution is normal, Draw a normal distribution curve, find the z- score, and then use Table A] (3)
Birth weights. The birth weights of males born full-term are normally distributed with mean ? = 3.4 kilograms and standard deviation ? = 0.5 kilograms. A large city hospital selects a random sample of 15 full-term males born in the last six months. a. Calculate the mean and standard deviation of the sampling distribution of x̄ for SRSs of size 15. Mean = Standard deviation = b. Interpret the standard deviation from part (a). c. Find the probability that the sample mean weight is greater than 3.55 kilograms. [ Hint: Determine if the distribution is normal, Draw a normal distribution curve, find the z- score, and then use Table A] (3)
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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- Birth weights. The birth weights of males born full-term are
normally distributed withmean ? = 3.4 kilograms and standard deviation ? = 0.5 kilograms. A large city hospital selects a random sample of 15 full-term males born in the last six months.
a. Calculate the mean and standard deviation of the sampling distribution of x̄
for SRSs of size 15.
Mean =
Standard deviation =
b. Interpret the standard deviation from part (a).
c. Find the probability that the sample mean weight is greater than 3.55 kilograms. [ Hint: Determine if the distribution is normal, Draw a normal distribution curve, find the z- score, and then use Table A] (3)
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