Question

"For a normal distribution with a mean of 16 and standard deviation of 2, what's the...

"For a normal distribution with a mean of 16 and standard deviation of 2, what's the probability of getting a number greater than 20? "

"Consider a normal distribution with a mean of 25 and standard deviation of 4. Approximately, what proportion of the area lies between values of 17 and 33. "

a. 95%

b. 68%

c. 99%

d. 50%

Two-hundred students took a statistics class. Their professor creatively decided to give each of them their Z-score instead of their grade. Rachel got her Z-score of -0.2. She was wondering how well she did on the exam.

"a. It was very good, much better than almost all of the other students "

"b. It was so-so, but still better than half of the students. "

"c. It was not that good, but not at the bottom of the distribution "

d. It was very bad and she needs to work much harder next time
Math   Statistics-And-Probability   
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