The two-way table represents the results of a random survey taken to determine the preferred vehicle for male and female drivers.
What percent of all participants in the survey are males who prefer a sedan?

The price of an item has been reduced by 30%. the original price was $30. what is the price of the item now ?

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.

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