Answer to Question #199186 in Statistics and Probability for Hosea

Question

1)A normal distribution has u=80 o=10. What is the probability of random selecting the following scores?

a) x > 75

b) x < 85

c) between the mean and score of 90

d) between the mean and score of 50

e) 75 < x <85

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2)Determine the z-score values in each of the following scenarios.

a)what z-score value separates the top 8% of a normal distribution from the bottom 92%?

b)what z-score value separates the top 72% of a normal distribution from the bottom 28%?

c)what z-scores value represents the middle 90% of the values in a normal distribution?

Answer 1

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