1) Calculate the actual percentage of all your 25 measurements which lie between Xs (show these calculations). Does your result differ from those expected for a pure Gaussian distribution?
2) Suppose your lab partner was talking to the students at an adjacent lab table when you started the timer. As a result, the time registered on the timer when it was stopped was 10 seconds. How many standard deviations (s) does this represent? Should you include this data point with the rest of your data? Why or why not?
3) If you have already taken 25 measurements, how many more measurements of reaction time would you have to take to reduce Som by a factor of two? Justify your response.
