A new weight-watching company, Weight Reducers International, advertises that ...

     1. A new   weight-watching company, Weight Reducers International, advertises that those   who join will lose, on the   average, 10 pounds the first two weeks with a standard deviation   of 2.8 pounds. A random sample   of 50 people who joined the new weight reduction program revealed the mean   loss to be 9 pounds. At the .05 level of significance, can we conclude that   those joining Weight Reducers on average will lose less than 10 pounds?   Determine the p-value.   

2. A recent study focused on the number of times men and women who live alone buy take-out dinner in a month ...