Mathematics, 15.07.2019 22:40 MorgannJ
an educational psychologist studies the effect of frequent testing on retention of class material. in one section of an introductory course, students are given quizzes each week. a second section of the same course receives only two tests during the semester. at the end of the semester, both sections take the same final examination. the summarized scores are as follows: (a) frequent quizzes--n=20, m=73, sample variance= 84 and (b) two tests--n=20, m=68, sample variance=96. use a two-tailed test with preset alpha=.05. provide the t statistic, df, critical value, and decision regarding the null hypothesis.
Answers: 2
Mathematics, 21.06.2019 18:00
Each month, a shopkeeper spends 5x + 14 dollars on rent and electricity. if he spends 3x−5 dollars on rent, how much does he spend on electricity? for which value(s) of x is the amount the shopkeeper spends on electricity less than $100? explain how you found the value(s).
Answers: 2
Mathematics, 22.06.2019 02:30
Ben works in his dads bakery packing bagels each package can have no more then 16 bagels 3/4 of the bagels in each package are plain what other fractions could represent the part of the bagels in each package that will be plain
Answers: 1
Mathematics, 22.06.2019 03:00
Harold wrote this equation to model the level of water in a pool over time. the variable x represents time in hours. f(x) = 3,500 - 225x which statements about the situation are true? check all that apply. the water level is rising. the water level is falling. the initial level of water in the pool was 3,500 units. the initial level of water in the pool was 225 units. the pool was empty after 14 hours. the water was 2,600 units high after 4 hours.
Answers: 2
Mathematics, 22.06.2019 03:30
Determine the equivalent system for the given system of equations: 5x − 3y = 6 x + y = 2
Answers: 3
an educational psychologist studies the effect of frequent testing on retention of class material. i...
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