B. In a random sample of 36 full-term newborn babies, the mean weight was found to be 7 pounds and a standard deviation to be 1.1 pounds. a) Find 95% confidence interval for mean weight of full-term babies. b) Find the margin of error. c) Write a good interpretation of the confidence interval.
B. In a random sample of 36 full-term newborn babies, the mean weight was found to be 7 pounds and a standard deviation to be 1.1 pounds. a) Find 95% confidence interval for mean weight of full-term babies. b) Find the margin of error. c) Write a good interpretation of the confidence interval.
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Number 8
![8.
In a random sample of 36 full-term newborn babies, the mean weight was found to be 7 pounds
and a standard deviation to be 1.1 pounds.
a) Find 95% confidence interval for mean weight of full-term babies.
b) Find the margin of error.
c) Write a good interpretation of the confidence interval.
A recent study reported that 56% of the children in a particular community were overweight or
obese. Suppose a random sample of 200 public school children is taken from this community.
Assume the sample was taken in such a way that the conditions for using the Central Limit
Theorem are met. We are interested in finding the probability that the proportion of overweight
Jobese children in the sample will be greater than 0.51.
9.
10. The mean age of all 617 used cars for sale in a newspaper one Saturday last month was 7.8
years, with a standard deviation of 7.6 years. The distribution of ages is right-skewed. For a
study to determine the reliability of classified ads, a reporter randomly selects 50 of these used
cars. What is the probability that in his sample the mean age of the cars was higher than 8
years?
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Transcribed Image Text:8.
In a random sample of 36 full-term newborn babies, the mean weight was found to be 7 pounds
and a standard deviation to be 1.1 pounds.
a) Find 95% confidence interval for mean weight of full-term babies.
b) Find the margin of error.
c) Write a good interpretation of the confidence interval.
A recent study reported that 56% of the children in a particular community were overweight or
obese. Suppose a random sample of 200 public school children is taken from this community.
Assume the sample was taken in such a way that the conditions for using the Central Limit
Theorem are met. We are interested in finding the probability that the proportion of overweight
Jobese children in the sample will be greater than 0.51.
9.
10. The mean age of all 617 used cars for sale in a newspaper one Saturday last month was 7.8
years, with a standard deviation of 7.6 years. The distribution of ages is right-skewed. For a
study to determine the reliability of classified ads, a reporter randomly selects 50 of these used
cars. What is the probability that in his sample the mean age of the cars was higher than 8
years?
9:28 AM
Desktop
50°F Sunny
11/8/2021
LL
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