A study is run to estimate the average number of toilet paperrolls a typical U.S. household currently have. Say a sample of 10households is selected last month and they reported the number oftoilet paper (in rolls) as follows.
                       75         56        50        94        65       111      97        88            103       98
- Assume the average amount of toilet paper a household usuallyhave is 55 rolls at national level. Test whether the mean number oftoilet paper rolls in this sample is significantly different fromthe national level? Use alpha level of .05.
- Based on your results from part (a), without calculating theconfidence interval, describe how the confidence interval of theaverage number of toilet paper at national level.  (Hint:interpret the meaning of confidence interval in relation to ahypothesis test.)
