STAT 100-Students took pictures of themselves squinting

Question # 00709850 Posted By: rey_writer Updated on: 08/08/2018 04:11 AM Due on: 08/08/2018
Subject Statistics Topic General Statistics Tutorials:
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Students took pictures of themselves squinting and another picture with their eyes wide open. The data were collected for the purpose of testing the null hypothesis that squinting didn't make a difference in the expected age guessed versus the alternative that squinting would make you look older. Forty-seven (n=47) students ages guessed by the computer averaged 3.64 years older when the students were squinting with a standard deviation of 12.87 years.


1.What is the standard error of the mean in this situation? Show your computations.


2.Find the test statistic (z-score) and then the p-value. Show your computations for the z-score and explain how you found the p-value.

What do you conclude?

(You should arrive at a p-value of about 2 or 3 percent indicating that the null hypothesis -- that squinting has no affect -- is a poor explanation of the data.)

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