The paper referenced in the previous exercise also gave summary statistics and graphs for the reaction time of drivers who were not listening to audiobooks. Data on reaction time (in milliseconds) consistent with those summary statistics for 10 drivers not listening to audiobooks are given here. 

961 904 1010 976 1018 1041 1004 981 995 991 

a. Use the data given in this exercise and the data given in the previous exercise to construct dotplots that would allow you to compare the reaction times for the two groups. 

b. Based on the dot plots, do you think that the standard deviation of the reaction times for people who are not listening to audiobooks would be less than, about the same as, or greater than the standard deviation that you calculated in the previous exercise for drivers who were listening to audiobooks? Explain your thinking. 

c. Calculate the standard deviation of the reaction times for the drivers who were not listening to audiobooks. Is the value of this standard deviation consistent with your answer in Part (b)? 

d. Describe how the distributions of reaction time differ for drivers who are listening to audiobooks and those who are not.