Mrs. Jordan surveyed all of her students to find out which testing format they prefer. Of the 120 students, 30 prefer ALEKS. com, 60 prefer paper, 10 prefer Deltamath. com and 20 prefer Microsoft Forms. What is the frequency of students who prefer taking their test online?
30

10

60

20

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.

Shannon drove for 540 minutes. if she traveled 65 miles per hour,how many total miles did she travel?

Acompany made a profit of 75000 over a period of 6 years on an initial investment of 15000 what is the annual roi