Mathematics, 21.07.2020 09:01 alondraalfaro06
You believe that requiring students to attend a series of presentations on study skills will improve their grades. You are concerned that boys and girls might react differently to such a series, and that students in grades 9 and 10 might react differently than those in grades 11 and 12. You set up an experiment involving 100 students in ninth and tenth grade and 100 students in eleventh and twelfth grade. (Assume there are equal numbers of girls and boys in each grade.) You intend to measure improvement based on pre- and post-treatment grade-point averages.
( A) Describe the design of an experiment to help you determine if a set of presentations on study skills is effective in improving grades.
(B) Suppose you have 50 students and need to assign them to two groups of equal size. Describe a randomization procedure that would achieve this.
(C) Suppose you have 50 students and need to assign them to two independent groups. Describe a randomization procedure that would achieve this.
(D) Describe an appropriate method of analysis for the data you collect from this experiment.
Answers: 3
Mathematics, 21.06.2019 22:30
Given the system of equations presented here: 2x + 4y = 14 4x + y = 20 which of the following actions creates an equivalent system such that, when combined with the other equation, one of the variables is eliminated? multiply the second equation by â’4 to get â’16x â’ 4y = â’80 multiply the second equation by â’1 to get â’4x â’ y = â’20 multiply the first equation by 2 to get 4x + 8y = 28 multiply the first equation by â’1 to get â’2x â’ 4y = â’14
Answers: 1
Mathematics, 22.06.2019 00:30
How many square centimeters of wrapping paper will be used to wrap the shoe box?
Answers: 1
You believe that requiring students to attend a series of presentations on study skills will improve...
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