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Author Question: The standard deviation of a standard normal distribution a. is always equal to zero. b. is always ... (Read 32 times)

olgavictoria

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on: Aug 1, 2018
The standard deviation of a standard normal distribution
 a. is always equal to zero.
  b. is always equal to one.
  c. can be any positive value.
  d. can be any value.

Question 2

Twenty-five percent of the employees of a large company are minorities. A random sample of 7 employees is selected.
 a. What is the probability that the sample contains exactly 4 minorities?
  b. What is the probability that the sample contains fewer than 2 minorities?
  c. What is the probability that the sample contains exactly 1 non-minority?
  d. What is the expected number of minorities in the sample?
  e. What is the variance of the minorities?


izzat

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Reply #1 on: Aug 1, 2018
Answer to Question 1

b

Answer to Question 2

a . 0.0577
b. 0.4450
c. 0.0013
d. 1.75
e. 1.3125


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