3. A recent study showed that the average number of sticks ofgum a person chews in a week is 15. A college student believes thatthe guys in his dormitory chew less gum in a week. He conducts astudy and samples 14 of the guys in his dorm and finds that onaverage they chew 13 sticks of gum in a week with a standarddeviation of 3.6. Test the college student's claim at ??=0.01.
Since the level of significance is 0.01 the critical value is-2.65
The test statistic is: (round to 3 places)
The p-value is: (round to 3 places)
4. A recent publication states that the average closing cost forpurchasing a new home is $8859. A real estate agent believes theaverage closing cost is more than $8859. She selects 22 new homepurchases and finds that the average closing costs are $8747 with astandard deviation of $107. Help her decide if she is correct bytesting her claim at ??=0.05.
Since the level of significance is 0.05 the critical value is1.721
The test statistic is: (round to 3 places)
The p-value is: (round to 3 places)
5. A new baker is trying to decide if he has an appropriateprice set for his 3 tier wedding cakes which he sells for $81.85.He is particullarly interested in seeing if his wedding cakes sellfor less than the average price. He searches online and finds thatout of 43 of the competitors in his area they sell their 3 tierwedding cakes for $82.38. From a previous study he knows thestandard deviation is $6.98. Help the new baker by testing thiswith a 0.01 level of significance.
Since the level of significance is 0.01 the critical value is2.326
The test statistic is: (round to 3 places)
The p-value is: (round to 3 places)
