Activity 1 of 2 Mr. Hall needs lights installed in his house and is trying to decide between two electric companies.

ABC Electric's charges can be represented by the equation y = 50x + 75

Two Electricians' charges can be represented by the following table:

X: 0 1 2 4
Y: 70 130 190 250

Complete each of the 2 activities for this Task.

Which company charges more per hour?

Activity 2 of 2

Mr. Hall is estimating he needs about 5 hours of work done. Which company should he choose if he is trying to save money? Show your work or explain your reasoning.

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.