Percentage of the grades

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The final marks for the Wednesday class in Statistics 101 are ready to be posted. The class average is 61%, with a standard deviation of 6. The distribution of grades is approximately bell-shaped. (Round the final answers to 2 decimal places.)

a. What percentage of the grades are above 79?

Percentage of grades %

b. What percentage of the grades are below 55?

Percentage of grades %

c. What percentage of the grades are between 55 and 73?

Percentage of grades %

d. What percentage of the grades are between 55 and 79?

Percentage of grades %

e. What percentage of the grades are between 55 and 67?

Percentage of grades %

f. What percentage of the grades are less than 43 or more than 73?

Percentage of grades %

Reference no: EM133033737

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