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 16:00
Which term best describes the association between variables a and b? no association a negative linear association a positive linear association a nonlinear association a scatterplot with an x axis labeled, variable a from zero to ten in increments of two and the y axis labeled, variable b from zero to one hundred forty in increments of twenty with fifteen points in a positive trend.
Answers: 3
Mathematics, 21.06.2019 21:30
Which equation is true? i. 56 ÷ 4·7 = 82 ÷ (11 + 5) ii. (24 ÷ 8 + 2)3 = (42 + 9)2 neither i nor ii ii only i and ii i only
Answers: 1
Mathematics, 21.06.2019 23:30
Asap (i need to finish this quick) graph complete the sequence of transformations that produces △x'y'z' from △xyz. a clockwise rotation ° about the origin followed by a translation units to the right and 6 units down produces δx'y'z' from δxyz.
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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