Question

1.   State the null hypothesis H_o and the alternative hypothesis H_a that would be used for a hypothesis test related to each of the following statements.
a.)   The average GPA of students enrolled in an AP Statistics class is higher than 3.5. (2 points)

b.)   The average retirement age of professional bull riders is less than 30 years. (2 points)

c.)   The mean life of incandescent bulbs is at least 750 hrs. (2 points)

d.)   The mean weight of college football players is no more than 210 lbs. (2 points)

e.)   The mean strength of welds by a new process is different from 570 lbs per unit area, the mean strength of welds by the new process. (2 points)

Answer 1

Answer:

a)   = Average GPA of students enrolled in an AP Statistics class.

  

b)    = The average retirement age of professional bull riders.

  

c)    =  The mean life of incandescent bulbs.

d)   = The mean weight of college football players.

  

e) = The mean strength of welds by a new process.