Given the information below, find the best predicted population size for a city with 120 murders in a year. the population sizes are in hundreds of thousands. in your answer address the following information: 1) give the least squares regression equation 2) identify the slope coefficient of this model and interpret it's meaning in the context of the variables listed. 3) state the best predicted population size for a city with 120 murders in a year.

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.