Mathematics, 07.04.2020 05:00 chelsie47
According to sleep researchers, if you are between the ages of 12 and 18 years old, you need 9 hours of sleep to be fully functional. A simple random sample of 28 students was chosen from a large high school, and these students were asked how much sleep they got the previous night. The mean of the responses was 7.9 hours, with a standard deviation of 2.1 hours. If we are interested in whether students at this high school are getting too little sleep, which of the following represents the appropriate null and alternative hypotheses? (a) H0:μ=7.9 and Ha:μ<7.9(b) H0:μ=7.9 and Ha:μ≠7.9(c) H0:μ=9 and Ha:μ≠9(d) H0:μ=9 and Ha:μ<9(e) H0:μ≤9 and Ha:μ≥9
Answers: 3
Mathematics, 21.06.2019 20:00, tionnewilliams21
Write the expression as a single natural logarithm. 2 in a - 4 in y
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Mathematics, 22.06.2019 03:30, waterborn7152
The length of a rectangular board is 3 feet less than twice its width. a second rectangular board is such that each of its dimensions is the reciprocal of the corresponding dimensions of the first rectangular board. if the perimeter of the second board is one-fifth the perimeter of the first, what is the perimeter of the first rectangular board?
Answers: 1
According to sleep researchers, if you are between the ages of 12 and 18 years old, you need 9 hours...
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