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Data are drawn from a bell-shaped distribution with a mean of 25 and a standard deviation...

Data are drawn from a bell-shaped distribution with a mean of 25 and a standard deviation of 3.

a. Approximately what percentage of the observations fall between 22 and 28? (Round your answer to the nearest whole percent.)
Percentage of observations? ________

b. Approximately what percentage of the observations fall between 19 and 31? (Round your answer to the nearest whole percent.)

Percentage of observations? _________

c. Approximately what percentage of the observations are less than 19? (Round your answer to 1 decimal place.)

Percentage of observations? __________

Math   Statistics-And-Probability   
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Homework Answers

Answer #1

a.

; due to symmetry

; from normal probability table

b.

; due to symmetry

; from normal probability table

c.

; due to symmetry

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