Question

A math professor notices that scores from a recent test are normally distributed with a mean of 70 and a standard deviation of 4.

(a) What score do 75% of the students test scores fall
below?

Answer:

(b) Suppose the professor decides to grade on a curve. If the
professor wants 2.5% of the students to get an A, what is the
minimum score for an A?

Answer:

Answer #1

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A math professor
notices that scores from a recent exam are normally distributed
with a mean of 72 and a standard deviation of 5.
(a) What score do 75% of the students exam scores fall
below?
Answer:
(b) Suppose the professor decides to grade on a curve. If the
professor wants 2.5% of the students to get an A, what is the
minimum score for an A?
Answer:

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Suppose the professor decides to grade on a curve. If the professor
wants 2.5% of the students to get an A, what is the minimum score
for an A? Answer:

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Suppose the grade on a Math test is normally distributed with
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Suppose the grade on a Math test is normally distributed with
mean 78 and standard deviation 10. (a) Compute the z-scores (5
points) (a-1) If Bob got 70 on the test, what is his z-score? (a-2)
If Jane got 90 on the test, what is her z-score? (b) Compute the
actual grades (5 points) (b-1) Suppose David achieved a grade 1.8
standard deviation above the mean (? = 1.8), what was his actual
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The scores on a Japanese test are normally distributed with a
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Scores of students in a large Statistics class are normally
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Which values, if any, are unusual? Select the correct choice
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