2.653 O 2.651 O None of the above The correct interpretation of the confidence interval is that we are 90% confident that the interval contains the Select an answer v length of commercials made since the year 2010. A similar study was conducted and found an interval of (20, 25.8). Can we claim the average length of all commercials made since 2010 is at least 19.4? O Yes O No O Not enough information to determine this Beyond representative sampling, what assumptions are needed to satisfy the requirements for this problem? OX - ~ normal orn> 30 OX - binomial and at least 5 successes and failures OX - binomial, np > 5 and nq > 5 ~ normal and n > 30 Submit Question .400
2.653 O 2.651 O None of the above The correct interpretation of the confidence interval is that we are 90% confident that the interval contains the Select an answer v length of commercials made since the year 2010. A similar study was conducted and found an interval of (20, 25.8). Can we claim the average length of all commercials made since 2010 is at least 19.4? O Yes O No O Not enough information to determine this Beyond representative sampling, what assumptions are needed to satisfy the requirements for this problem? OX - ~ normal orn> 30 OX - binomial and at least 5 successes and failures OX - binomial, np > 5 and nq > 5 ~ normal and n > 30 Submit Question .400
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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Please help with all parts.not sure of my answer.
Transcribed Image Text:A random sample of 38 commercials made since the year 2010 has an average of 24.7 seconds with a
standard deviation of 9.7 seconds. What is the margin of error that corresponds to a 90% confidence
interval for the average length of all commercials made since 2010?
O2.588
O 2.655
O2.653
O 2.651
O None of the above
The correct interpretation of the confidence interval is that we are 90% confident that the interval
contains the Select an answer v length of commercials made since the year 2010.
A similar study was conducted and found an interval of (20, 25.8). Can we claim the average length of all
commercials made since 2010 is at least 19,4?
O Yes
O No
O Not enough information to determine this
Beyond representative sampling, what assumptions are needed to satisfy the requirements for this
problem?
OX - normal or n > 30
OX - binomial and at least 5 successes and failures
OX - binomial, np > 5 and ng > 5
OX - normal and n > 30
Submit Question
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