All 150 eighth grade students at a local middle school were asked how many hours they studied during the week. each row of the table represents one sample from the population. find the mean of each sample. population data row 1 6 5 3 0 4 row 2 4 5 3 5 6 row 3 7 1 4 5 3 row 4 4 2 5 6 3 which row has the greatest mean?

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.

An elevator travels 310 feet in 10 seconds. at that speed, how far can't his elevator travel in 12 seconds?

Which choice has the correct steps in graphing the solution set to the following inequality? -45_> 20x-5y