Mathematics, 21.03.2020 00:39 talanna394
Null hypotheses and research hypotheses: For each of the following examples, state the null hypothesis and the research hypothesis, in both words and symbolic notation:
a. A researcher is interested in studying the relation between the use of antibacterial products and the dryness of people’s skin. He thinks these products might alter the moisture in skin compared to other products that are not antibacterial.
b. A student wonders if grades in a class are in any way related to where a student sits in the classroom. In particular, do students who sit in the front row get better grades, on average, than the general population of students?
c. Cell phones are everywhere, and we are now available by phone almost all of the time. Does this translate into a change in the nature or closeness of our long-distance relationships?
Answers: 3
Mathematics, 21.06.2019 14:30, devinblitz4363
Me #1 using vocabulary words, including the word “congruent”, state why the measure of angle d is 120 degrees. #2 what is the measure of angle e and why?
Answers: 1
Mathematics, 21.06.2019 16:00, tomtom6870
Trish receives $450 on the first of each month. josh receives $450 on the last day of each month. both trish and josh will receive payments for next four years. at a discount rate of 9.5 percent, what is the difference in the present value of these two sets of payments?
Answers: 1
Mathematics, 21.06.2019 19:00, myalee1419
In trapezoid abcd, ac is a diagonal and ∠abc≅∠acd. find ac if the lengths of the bases bc and ad are 12m and 27m respectively.
Answers: 3
Null hypotheses and research hypotheses: For each of the following examples, state the null hypothes...
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