Mathematics, 01.09.2020 21:01 jlankford148
Which of the following is the most useful descriptive statistic for measuring dispersion?a. rangeb. variancec. mean deviationd. standard deviation
Answers: 1
Mathematics, 21.06.2019 20:50
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.
Answers: 3
Mathematics, 21.06.2019 21:30
Jalen charges $25.50 for every 3 hours of yard work he does for his neighbors. ralph charges $34 for every 4 hours of work that he does. who charges less? opinions: 1.they charge the same amount 2.jalen 3.ralph
Answers: 1
Mathematics, 22.06.2019 01:00
Find the rate of change for the situation.you run 7 miles in one hour and 21 miles in three hours.
Answers: 1
Mathematics, 22.06.2019 04:20
1. suppose that scores on a knowledge test are normally distributed with a mean of 71 and a standard deviation of 6. a. label the curve: show the mean and the value at each standard deviation: b. if angelica scored a 76 on the test, what is her z-score? (draw her score on the curve above and label) c. what percent of students did angelica score higher than? how can you tell? d. if 185 students took the test, how many students scored higher than angelica?
Answers: 3
Which of the following is the most useful descriptive statistic for measuring dispersion?a. rangeb....
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