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SHOW ME THE STEPS: Two thousand students took an exam. The scores on the exam have an approximate normal distribution with a mean =80 points

SHOW ME THE STEPS:

Two thousand students took an exam. The scores on the exam have an approximate normal distribution with a mean =80 points and standard deviation =10 points.

Round your answers to one decimal place.

(a) Calculate the first- and third-quartile scores for this exam.

Q1=

Q3=

b) The middle 50% of the exam scores are between what two values? Enter your answers in increasing order.

The middle 50%of the exam scores are between points and points.

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