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In a survey of women in a certain country (ages 20-29), the

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In a survey of women in a certain country (ages 20-29), the mean height was 63.2 inches with a standard deviation of 2.81 inches.

1) what height represents 80th percentile?
2) what height represents the first quartile>
Submitted: 6 years ago.
Category: Math Homework
Expert:  abozer replied 6 years ago.

abozer :

Hi again,

abozer :

1)

abozer :

z = 0.816 for 80th percentile so,

abozer :

z = (x - 63.2)/2.81 = 0.8416

abozer :

x = 65.56

abozer :

2)

abozer :

z = -0.6745 for first quartile so,

abozer :

z = (x - 63.2)/2.81 = -0.6745


abozer :

x = 61.30

abozer :

Let me know if you have any questions.

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