Mathematics, 17.09.2019 22:10 rajene9302
The math department recently purchased new learning software for their freshman math classes. the instructors want to use the learning software instead of a textbook. so they decide to study the effectiveness of the software. first they test the skills and concept mastery for a number of the freshman math students. then they randomly divide the students into two groups. one group uses the learning software for a particular lesson and the other group uses the regular textbook. then the instructors retest all of the students and compare the improvement in the skills and concept mastery for the two groups. what is the purpose of random assignment in this experiment? check all that apply. to produce treatment groups with similar characteristics to avoid bias to generalize the experiment results to all freshman math students to control for confounding variables quiz
Answers: 3
Mathematics, 21.06.2019 16:30, kayleefaithblair
Scott harris can invest $7,000 in a 1-year cd that earns interest at an annual rate of 4 percent compounded monthly. the amount per $1.00 is 1.040742. he can also invest $7,000 in a 1-year cd at annual rate of 4 percent compounded quarterly. the amount per $1.00 is 1.040604. what is the difference in the amount of interest earned for each investment? a) $0.96 b) $0.81 c) $0.87 d) $0.88
Answers: 1
Mathematics, 21.06.2019 17:30, QueenNerdy889
Suppose that an airline uses a seat width of 16.516.5 in. assume men have hip breadths that are normally distributed with a mean of 14.414.4 in. and a standard deviation of 0.90.9 in. complete parts (a) through (c) below. (a) find the probability that if an individual man is randomly selected, his hip breadth will be greater than 16.516.5 in. the probability is nothing. (round to four decimal places as needed.)
Answers: 3
Mathematics, 21.06.2019 20:00, oofoofoof1
Fred has a spinner that is split into four equal sections: red, blue, green, and yellow. fred spun the spinner 688 times. which of the following would be a good estimate of the number of times the spinner lands on the green section? a. 269 b. 603 c. 344 d. 189
Answers: 1
The math department recently purchased new learning software for their freshman math classes. the in...
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