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Home Q & A Board Science-Related Homework Help Psychology
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lacerna92 lacerna92
wrote...
6 years ago
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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wrote...
#1
6 years ago
Answer to q. 1

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

Answer to q. 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
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