17. What is another name for normal distribution? A. Gaussian distribution B. Poisson distribution C. Bernoulli’s distribution D. Probability distribution 18. What is the total area in the distribution under the normal curve? A. O B. 1 C. 2 D. 3 19.Which of the following is a parameter of normal distribution? A. mean B. standard deviation C. mean and standard deviation D. none of the above 20.The graph of a normal distribution is symmetrical about the_. A. mean B. standard deviation C. mean and standard deviation D. none of the above
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