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Mathematics, 06.02.2020 01:47 CarlyAnnn9949
An instructor in a college class recently gave an exam that was worth a total of 100 points. the instructor inadvertently made the exam harder than he had intended. the scores were very symmetric, but the average score for his students was 43 and the standard deviation of the scores was 5 points. the instructor is considering 2 different strategies for rescaling the exam results: method 1: add 17 points to everyone's score. method 2: multiply everyone's score by 1.7. which of the following are true?
a) method 1 will increase the standard deviation of the students' scores
b) method 2 will increase the standard deviation of the students' scores.
c) method 1 will decrease the standard deviation of the students' scores.
d) method 2 will decrease the standard deviation of the students' scores.
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