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In: Statistics and Probability

Scores on a statistics final in a large class were normally distributed with a mean of...

Scores on a statistics final in a large class were normally distributed with a mean of 76 and a standard deviation of 9.

(a) Find the 25th percentile of the scores.

(b) Find the 79th percentile of the scores.

(c) The instructor wants to give an A to the students whose scores were in the top 13% of the class. What is the minimum score needed to get an A?

(d) Between what two values is the middle 60% of the scores?Round the answers to at least two decimal places.

https://static.aleks.com/aleks/resources/gibbs/9780077836351_Cumulative_Normal_Distribution.pdf

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orchestra answered 2 years ago
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