Mathematics, 24.03.2020 20:08 leenzazou98241
Guessing on a Test The designers of a true-false test would like to find out how a student would perform if the student just guessed all the answers at random. (Designers of multiple-choice tests like the SAT have to consider this issue as well.) There are 100 questions on the test. One point is awarded for each correct answer and 1 point is taken away for any other kind of answer (wrong, missing, ambiguous, or anything other than correct). The test designers have figured out that the number of questions the student gets right by guessing at random has expectation 50 and SD 5 a) Let W be the number of questions the student does not get right. Find E(W) and SD(W). b) Let S be the student's score on the test. Find E(S) and SD(S).
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Mathematics, 21.06.2019 21:50
Prism m and pyramid n have the same base area and the same height. cylinder p and prism q have the same height and the same base perimeter. cone z has the same base area as cylinder y, but its height is three times the height of cylinder y. the figures and have the same volume.
Answers: 3
Mathematics, 21.06.2019 22:00
Luke started a weight-loss program. the first week, he lost x pounds. the second week, he lost pounds less than times the pounds he lost the first week. the third week, he lost 1 pound more than of the pounds he lost the first week. liam started a weight-loss program when luke did. the first week, he lost 1 pound less than times the pounds luke lost the first week. the second week, he lost 4 pounds less than times the pounds luke lost the first week. the third week, he lost pound more than times the pounds luke lost the first week.
Answers: 2
Mathematics, 21.06.2019 23:40
Put the following steps for calculating net worth in the correct order
Answers: 1
Mathematics, 22.06.2019 01:00
Can anyone explain to me how to do this? anything will .
Answers: 1
Guessing on a Test The designers of a true-false test would like to find out how a student would per...
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