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1. Let ‘X’ be the scores on a skills test with μ = 100 and σ...

1. Let ‘X’ be the scores on a skills test with μ = 100 and σ = 10. Assume the scores follow a normal distribution.

a. Find the number of standard deviations above or below the mean of each of the following scores on the computer test: 95, 110, 130.

b. Use a diagram to find the raw scores equivalent to the following z scores: 0, −1, −2, 1, 2.

c. What is the z score for a raw score of 118.4?

d. What proportion of the scores were greater than 118.4?

math   Statistics-And-Probability   
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