Directions: Complete the assignment on your own paper. Clearly label each answer

Question

Directions: Complete the assignment on your own paper. Clearly label each answer. Your answers for this assignment must include reasons; simply stating the answer without justification will earn partial credit. (28 points) State the null hypothesis Ho and the alternative hypothesis Ha that would be used for a hypothesis test related to each of the following statements. 1. a.) The mean age of the students enrolled in evening classes at a certain college is greater than 26 years. (2 points) b.) The mean weight of packages shipped on Air Cargo during the past year was less than 36.7 lbs. (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)

Explanation / Answer

a)
H0: mu <= 26
Ha: mu > 26 (claim is : the mean age of students is greater than 26)

b)
H0: mu >= 36.7
Ha: mu < 36.7 (claim is : the mean weight of packages is less than 26)

c)
H0: mu >= 750 (claim is mean life is at least 750 hours)
H1: mu < 750

d)
H0: mu <= 210 (claim is : mean weight is no more than 210)
H1: mu > 210

e)
H0: mu = 570
H1: mu not equals to 570 (claim is mean strength of welds is different from 570)

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