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Test D: population mean  = 150 and standard deviation  = 20. Danyang’s test score...

Test D: population mean  = 150 and standard deviation  = 20. Danyang’s test score is X = 140.

D1.1. Draw the normal curve for this distribution.

D1.2. State the value of a score X in the distribution that corresponds to the 99.87th percentile rank.

D1.3. Compute the person’s z-score.

D1.4. Write an X in the distribution’s horizontal axis where the person’s score is located.

D1.5. State the area (proportion) of the curve between the mean  and the z-score (back of the text). Do not round the value

Math   Statistics-And-Probability   
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