Mehl et al. (2007) published a study in the journalSciencereporting the results of an extensive study of men and women comparing the number of words uttered per day by each sex. Volunteer participants wore inconspicuous recording devices that recorded their daily word usage. On average, women (N= 198) uttered 16,201 words per day (SD= 1779.45), and men uttered 15,993 words per day (SD= 2224.61). Treating the men's data as the population parameters, do the following:

a)Calculate the point estimate for women's words uttered per day. (2 points)

b)Calculate the 95 percent confidence interval around the point estimate. Show your work. (5 points)

c)Make a decision regarding the null hypothesis on the basis of this confidence interval.(3 points)