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In: Statistics and Probability

Mr. Cooper recently gave a test to his 50 student history class. The scores were normally...

Mr. Cooper recently gave a test to his 50 student history class. The scores were normally distributed with a mean of 75 and a standard deviation of 7.

1) What percentage of students scored higher than​ 85?​% (Round to two decimal​ places)

2) What percentage of students scored between 73 and​ 80?% ​(round to two decimal​ places)

3) 75% of the students scored higher than what​ score? ​(Round to two decimal​ places)

​4) 30% of students scored lower than what​ score? (Round to two decimal​ places)

5) Approximately how many students got a C​ (70) or higher on the​ exam?  nothing

6) Approximately how many students got an A​ (90+) on the​ exam?

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orchestra answered 2 years ago
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