Please answer all 3 problems. 8, The test scores from professor Acme\'s class ar

Question

Please answer all 3 problems.

8, The test scores from professor Acme's class are summarized in the frequency table below, Test Score Number of Tests 50-59 60-69 70-79 80- 89 90-99 (a) Assuming the scores between 90 and 99 received an A, scores between 80 and 89 received a B, scores between 70 and 79 received a C, scores between 60 and 69 received a D and the remaining scores received an F, what was the modal "Grade"? Why? (b) Assuming the scores between 90 and 99 received an A, scores between 80 and 89 received a B, scores between 70 and 79 received a C, scores between 60 and 69 received a D and the remaining scores received an F, what was the median "Grade"? Why?

Explanation / Answer

8:

(a)

Modal class is the class with highest freuency. That is required modal class is 60-69. So modal grade is D.

(b)

Since there are 40 students so median class will be the class in which 20th and 21st observations lies. That is median class is 70-79. The median grade is C.

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