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oksano4ka [1.4K]
1 year ago
4

The relative frequency table describes the relationship between students who completed an exam review and their performance on t

he exam.
Passed exam Did not pass exam. Row Totals
Completed exam review 55% 10% 65%
Did not complete exam review 20%. 15% 35%
Column Totals 75% 25%. 100%


Part A: What is the percentage of students who passed the exam, given that they completed the exam review? Round to the nearest percentage. (2 points)

Part B: What is the percentage of students who passed the exam, given that they did not complete the exam review? Round to the nearest percentage. (2 points)

Part C: Is there an association between passing the exam and completing the exam review? Justify your answer. (2 points)
Mathematics
1 answer:
erik [133]1 year ago
7 0

a) The percentage of students who passed the exam, given that they completed the exam review is of 73%.

b) The percentage of students who passed the exam, given that they did not complete the exam review, is of 27%.

c) There is a positive association between passing the exam and completing the exam review.

<h3>How to obtain the percentages?</h3>

A percentage is obtained by the division of the desired amounts by the total amounts, multiplied by 100%.

For item a, these amounts are given as follows:

  • Desired: 55% that passed and completed the exam review.
  • Total: 75% that passed.

Hence the percentage is of:

p = 55/75 = 0.73 = 73%.

For item b, these amounts are given as follows:

  • Desired: 20% that passed and did not completed the exam review.
  • Total: 75% that passed.

Hence the percentage is of:

p = 20/75 = 0.27 = 27%.

There is a positive association between passing the exam and completing the exam review, as the percentage of students who passed completing the review, found in item a, is greater than the percentage of students who passed without completing the review, found in item b.

More can be learned about percentages at brainly.com/question/843074

#SPJ1

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