Question

A sample of final exam scores is normally distributed with a mean equal to 20 and...

A sample of final exam scores is normally distributed with a mean equal to 20 and a variance equal to 16.

  • Part (a)

    What percentage of scores are between 16 and 24? (Round your answer to two decimal places.)
      %

  • Part (b)

    What raw score is the cutoff for the top 10% of scores? (Round your answer to one decimal place.)

  • Part (c)

    What is the proportion below 15? (Round your answer to four decimal places.)

  • Part (d)

    What is the probability of a score less than 25? (Round your answer to four decimal places.)

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