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AFahdom sample of 35 commercials made since the year 2010 has an average of 25.5 seconds with a standard deviation of 7.1 seconds. What is the margin of error that corresponds to a 99% confidence interval for the average length of all commercials made since 2010? 3.274 3.264 3.092 3.269 None of the above The correct interpretation of the confidence interval is that we are 99% confident that the interval contains length of commercials made since the year 2010. the Select an answer A similar study was conducted and found an interval of (21.4, 26.1). Can we claim the average length of all commercials made since 2010 is at least 21.7?

AFahdom sample of 35 commercials made since the year 2010 has an average of 25.5 seconds with a standard deviation of 7.1 seconds. What is the margin of error that corresponds to a 99% confidence interval for the average length of all commercials made since 2010? 3.274 3.264 3.092 3.269 None of the above The correct interpretation of the confidence interval is that we are 99% confident that the interval contains length of commercials made since the year 2010. the Select an answer A similar study was conducted and found an interval of (21.4, 26.1). Can we claim the average length of all commercials made since 2010 is at least 21.7?

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
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A random sample of 35 commercials made since the year 2010 has an average of 25.5 seconds with a standard deviation of 7.1 seconds. What is the margin of error that corresponds to a 99% confidence interval for the average length of all commercials made since 2010? 3.274 3.264 3.092 3.269 None of the above The correct interpretation of the confidence interval is that we are 99% confident that the interval contains the Select an answer length of commercials made since the year 2010. A similar study was conducted and found an interval of (21.4, 26.1). Can we claim the average length of all commercials made since 2010 is at least 21.7? Yes No O Not enough information to determine this Beyond representative sampling, what assumptions are needed to satisfy the requirements for this problem? X ~ normal and n > 30 X ~ binomial and at least 5 successes and failures X ~ binomial, np 2 5 and ng 2 5 X ~ normal or n > 30
Transcribed Image Text:A random sample of 35 commercials made since the year 2010 has an average of 25.5 seconds with a standard deviation of 7.1 seconds. What is the margin of error that corresponds to a 99% confidence interval for the average length of all commercials made since 2010? 3.274 3.264 3.092 3.269 None of the above The correct interpretation of the confidence interval is that we are 99% confident that the interval contains the Select an answer length of commercials made since the year 2010. A similar study was conducted and found an interval of (21.4, 26.1). Can we claim the average length of all commercials made since 2010 is at least 21.7? Yes No O Not enough information to determine this Beyond representative sampling, what assumptions are needed to satisfy the requirements for this problem? X ~ normal and n > 30 X ~ binomial and at least 5 successes and failures X ~ binomial, np 2 5 and ng 2 5 X ~ normal or n > 30
A random sample of 35 commercials made since the year 2010 has an average of 25.5 seconds with a standard deviation of 7.1 seconds. What is the margin of error that corresponds to a 99% confidence interval for the average length of all commercials made since 2010? 3.274 3.264 3.092 3.269 None of the above The correct interpretation of the confidence interval is that we are 99% confident that the interval contains length of commercials made since the year 2010. th v Select an answer actual mean sample mean actual proportion lucted and found an interval of (21.4, 26.1). Can we claim the average length of all 2010 is at least 21.7? CO sample proportion No O Not enough information to determine this Beyond representative sampling, what assumptions are needed to satisfy the requirements for this problem? OX~ normal and n > 30 X~ binomial and at least 5 successes and failures X~ binomial, np > 5 and ną > 5 ~ normal or n > 30
Transcribed Image Text:A random sample of 35 commercials made since the year 2010 has an average of 25.5 seconds with a standard deviation of 7.1 seconds. What is the margin of error that corresponds to a 99% confidence interval for the average length of all commercials made since 2010? 3.274 3.264 3.092 3.269 None of the above The correct interpretation of the confidence interval is that we are 99% confident that the interval contains length of commercials made since the year 2010. th v Select an answer actual mean sample mean actual proportion lucted and found an interval of (21.4, 26.1). Can we claim the average length of all 2010 is at least 21.7? CO sample proportion No O Not enough information to determine this Beyond representative sampling, what assumptions are needed to satisfy the requirements for this problem? OX~ normal and n > 30 X~ binomial and at least 5 successes and failures X~ binomial, np > 5 and ną > 5 ~ normal or n > 30
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Solution:

Given information:

n=35 Sample size 

x=25.5 seconds  Sample means=7.1 seconds Sample standard deviations α=0.01 Level of significance 

 

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