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The semester average grade for a statistics course is 76 with a standard deviation of 5.5....

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Basic Math

The semester average grade for a statistics course is 76 with astandard deviation of 5.5. Assume that stats grades have abell-shaped distribution and use the empirical rule to answer thefollowing questions (explain your responses with the help of agraph):

1. What is the probability of a student’s stat grade beinggreater than 87?

2. What percentage of students has stat grades between 70.5 and81.5?

3. What percentage of students has stat grades between 70.5 and65?

4. What is the probability of a student’s stat grade beinggreater than the mean?

Answer & Explanation Solved by verified expert
4.3 Ratings (726 Votes)
The empirical rule also known as the threesigma rule or the 6895997 rule provides a quick estimate of the spread of data in a normal distribution given the mean and standard    See Answer
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