9. Give the type of distribution pattern that occurs when the majority of the data values fall to the left of the mean? A) symmetrical B) positively skewed C) negatively skewed D) left skewed Ans: B 10. The total area under the normal distribution curve is approximately 0.99 but can never be equal to 1.0. Ans: False 11. For a normal curve with mean 8 and standard deviation 7, which of the following parts of the normal curve will have an area of approximately 68%? A) from 4.5 to 11.5 B) from 1 to 15 C) from 8 to 22 D) from 6 to 22 Ans: B 12. Find the probability P(z > 0.78) using the standard normal distribution.
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