Write the null and alternative hypotheses for each of the following examples. Determine if each is a case of a two-tailed, a left-tailed, or a right-tailed test.
a. To test if the mean amount of time spent per week watching sports on television by all adult men is different from 9.5 hours
b. To test if the mean amount of money spent by all customers at a supermarket is less than $105
c. To test whether the mean starting salary of college graduates is higher than $47,000 per year
d. To test if the mean waiting time at the drive-through window at a fast food restaurant during rush hour differs from 10 minutes
e. To test if the mean hours spent per week on house chores by all housewives is less than 30