1 use the relative frequency approach to construct a


An instructor allows students to take an exam as many times as needed until the student obtains a passing grade. The following is a record of the number of students in a class of 20 who took the test and the number of tests taken in order to obtain a passing grade.

Students

Number of Tests

9

1

6

2

3

3

2

4

1. Use the relative frequency approach to construct a probability distribution and show that it satisfies the required condition.

2. Find the expected value of the number of tests taken.

3. Compute the variance.

4. Compute the standard deviation.

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Business Management: 1 use the relative frequency approach to construct a
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