The ratio of boys to girls in a club is 4:3. If there are 48 boys, how many members of the club are there?

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.

The graph shows the first four ordered pairs formed by the corresponding terms of two patterns. which ordered pair would be the fifth point on this graph? a. 12,8 b. 12,4 c. 10,4 d. 4,12

According to a survey by the beach lifeguards, there is a 25% chance that surfers will see a dolphin while surfing. which simulation could you use to answer questions about whether a surfer will see a dolphin?