STAT 100Students took pictures of themselves squinting
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. Fortyseven (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 (zscore) and then the pvalue. Show your computations for the zscore and explain how you found the pvalue.
What do you conclude?
(You should arrive at a pvalue of about 2 or 3 percent indicating that the null hypothesis  that squinting has no affect  is a poor explanation of the data.)

Rating:
5/
Solution: STAT 100Students took pictures of themselves squinting