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 17:00
Omar is going on a road trip! the car rental company offers him two types of cars. each car has a fixed price, but he also needs to consider the cost of fuel. the first car costs $90 to rent, and because of its fuel consumption rate, there's an additional cost of s0.50 per kilometer driven.
Answers: 2
Mathematics, 21.06.2019 19:30
Kendra had twice as much money as kareem. kendra later spent $8 and kareem earned $6. by then,the two had the same amount of money. how much money did each have originally?
Answers: 1
Mathematics, 21.06.2019 22:30
The pair of coordinates that do not represent the point( 5,150’) is a. (5,-210) b. (5,210) c. (-5,330) d. (-5,-30)
Answers: 1
an educational psychologist studies the effect of frequent testing on retention of class material. i...
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