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THIS QUESTION HAS MULTIPLE PARTS: Find the mean and standard deviation of the following list of...

THIS QUESTION HAS MULTIPLE PARTS:

Find the mean and standard deviation of the following list of quiz scores: 99, 88, 65, 90. Round the standard deviation to two decimal places.

mean

standard deviation

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A class has an equal number of boys and girls. The boys all got 75% on a test and the girls all got 87%. What are the mean and standard deviation of the test scores for the entire class?

mean

standard deviation  

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A class has 16 boys and 21 girls. The class as a whole has a GPA (grade point average) of 2.96, and the boys have a GPA of 2.40. What is the GPA of the girls? (Round your answer to two decimal places.)

    
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