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ivanzud

  • one year ago

The grades on the last art exam had a mean of 75%. Assume the population of grades on art exams is known to be distributed normally, with a standard deviation of 7%. Approximately what percent of students earn a score between 75% and 82%?

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  1. campbell_st
    • one year ago
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    do you are looking at the percentage of students between the mean and 1 standard deviation above the mean... look at the graph attached and see what percentage is between 0 and 1

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  2. campbell_st
    • one year ago
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    then you can get your answer

  3. ivanzud
    • one year ago
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    Oh Thanks! I get it now since 75+7=82, there is only 1 deviation. But if I didn't have the graph, how would i know the percentage?

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