## [answered] A normal population has a mean of 19 and a standard deviati

 A normal population has a mean of 19 and a standard deviation of 4.

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 a. Compute the?z?value associated with 23.?(Round your answer to 2 decimal places.)

??

 ??Z ??

???

 b. What proportion of the population is between 19 and 23??(Round ?z-score computation to 2 decimal places and your final answer to 4 decimal places.)

??

 ??Proportion ??

????

 c. What proportion of the population is less than 17??(Round z-score computation to 2 decimal places and your final answer to 4 decimal places.)

??

 ??Proportion ??

?

A Normal Distribution

? = 19

?=4

for x = 23, Standardized value of z-score is given by:

z=

z= x??

? 23 ? (19)

= 1.00

4 for x = 23, z = 1

This is 1 standard deviations above the mean.

99.7%...

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This question was answered on: Sep 18, 2020

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