The table below shows the number of students who attend various after-school activities. After-School Activities
Activity
Number of Students
Spanish Club
19
Basketball
24
Drama Club
15
Homework Help
17
Soccer
20

Which does the ratio 17:44 represent?
the part-to-part relationship between homework help and sports
the part-to-whole relationship between homework help and sports
the part-to-part relationship between homework help and all activities
the part-to-whole relationship between homework help and all activities

An automobile assembly line operation has a scheduled mean completion time, μ, of 12 minutes. the standard deviation of completion times is 1.6 minutes. it is claimed that, under new management, the mean completion time has decreased. to test this claim, a random sample of 33 completion times under new management was taken. the sample had a mean of 11.2 minutes. assume that the population is normally distributed. can we support, at the 0.05 level of significance, the claim that the mean completion time has decreased under new management? assume that the standard deviation of completion times has not changed.