Mathematics, 18.05.2021 03:00 sebastianapolo5
A school newspaper article claims that the mean weight of student backpacks is 20 pounds. A student of this school would like to test the hypotheses H Subscript 0 Baseline: mu= 20 versus H Subscript alpha Baseline: mu not-equals20 where μ = the true mean weight of all backpacks using a random sample of 30 students. The power of this test to reject the null hypothesis when μ = 19.5 is 0.78 when a significance level of 0.05 is used. Which of the following would increase the power of this test?
decrease the significance level to 0.01
decrease the sample size to 25 students
increase the sample size to 50 students
increase the alternative value of the parameter to μ = 19.75
Answers: 2
Mathematics, 21.06.2019 20:00
Someone answer asap for ! max recorded the heights of 500 male humans. he found that the heights were normally distributed around a mean of 177 centimeters. which statements about max’s data must be true? a. the median of max’s data is 250 b. more than half of the data points max recorded were 177 centimeters. c. a data point chosen at random is as likely to be above the mean as it is to be below the mean. d. every height within three standard deviations of the mean is equally likely to be chosen if a data point is selected at random.
Answers: 1
Mathematics, 21.06.2019 23:00
Either enter an exact answer in terms of \piπ or use 3.143.14 for \piπ and enter your answer as a decimal.
Answers: 2
A school newspaper article claims that the mean weight of student backpacks is 20 pounds. A student...
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