[Answered] For a normal distribution with = 500 and = 100, find the following values: a. What X value ...

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Author Question: For a normal distribution with = 500 and = 100, find the following values: a. What X value ... (Read 72 times)

chads108

Hero Member
Posts: 507

on: Jun 20, 2018

For a normal distribution with = 500 and = 100, find the following values:

a. What X value separates the highest 10 of the distribution from the rest of the scores?
b. What X values form the boundaries for the middle 60 of the distribution?
c. What is the probability of randomly selecting a score greater than X = 475?

Question 2

For a normal distribution with a mean of = 100 and a standard deviation of = 10, find each of the following probabilities:

a. p(X> 102) c. p(X< 130)
b. p(X< 85) d. p(95

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IAPPLET

Sr. Member
Posts: 333

Reply #1 on: Jun 20, 2018

Answer to Question 1

a. z= 1.28 X = 628
b. z = 0.84 X = 416 to 584
c. z = 0.25 p = 0.5987

Answer to Question 2

a. z = 0.20 p = 0.4207
b. z = 1.50 p = 0.0668
c. z = 3.00 p = 0.9987
d. z = 0.50 p = 0.3830

chads108

Hero Member
Posts: 507

Reply #2 on: Jun 20, 2018

Thank you!

IAPPLET

Sr. Member
Posts: 333

Reply #3 on: Jun 20, 2018

Happy to help

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