Mathematics, 15.12.2020 21:50 reycaden
Forty-nine volunteer college students were told they were going to watch a lecture on video and rate the instructor Twenty-five students were randomly selected and told that other students had rated the instructor as "charismatic": lively, stimulating, and encouraging. The other twenty-four students were told that other students had rated the instructor as “punitive": not helpful, not interested in students, and a hard grader. Then, all students watched the same twenty-minute video given by the same instructor. They then rated the instructor in that video. The students who were told that the instructor was charismatic gave higher ratings, on average, than the students who were told that the instructor was punitive. We cannot tell whether this was a well-designed experiment because:
a
the number of students may have been too small
b the video may have been too short.
c all students observed the same video. d the subjects were volunteers.
e only one group was randomly assigned.
Answers: 1
Mathematics, 21.06.2019 15:40
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Mathematics, 21.06.2019 19:00
Samantha is growing a garden in her back yard. she spend $90 setting up the garden bed and buying the proper garden supplies. in addition, each seed she plants cost $0.25. a. write the function f(x) that represents samantha's total cost on her garden. b. explain what x represents. c. explain what f(x) represents. d. if samantha plants 55 seeds, how much did she spend in total?
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Mathematics, 21.06.2019 20:50
There are three bags: a (contains 2 white and 4 red balls), b (8 white, 4 red) and c (1 white 3 red). you select one ball at random from each bag, observe that exactly two are white, but forget which ball came from which bag. what is the probability that you selected a white ball from bag a?
Answers: 1
Forty-nine volunteer college students were told they were going to watch a lecture on video and rate...
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