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Quiz2a - Quiz(WK2 1 Which of the following is NOT true...

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Quiz (WK2) 1. Which of the following is NOT true regarding the normal distribution? (Points : 1) Mean, median and mode are all equal It has a single peak It is symmetrical The points of the curve meet the X-axis at z = 3 and z = 3 2. For a standard normal distribution, what is the probability that z is greater than 1.75? (Points : 1) 0.0401 0.0459 0.4599 0.9599 3. The mean of a normally distributed group of weekly incomes of a large group of executives is $1,000 and the standard deviation is $100. What is the z-score for an income of $1,100? (Points : 1) 1.00 2.00 1.683 0.90 4. What is the area under the normal curve between z = 0.0 and z = 2.0? (Points : 1) 1.0000 0.7408 0.1359 0.4772 5. What is the area under the normal curve between z = 1.0 and z = 2.0? (Points : 1) 0.0228 0.3413 0.1359 0.4772
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6. What is the area under the normal curve between z = 0.0 and z = 1.79? (Points : 1) 0.4633 0.0367 0.9599 0.0401 7. The mean of a normal distribution is 400 pounds. The standard deviation is 10 pounds. What is the area between 415 pounds and the mean of 400 pounds? (Points : 1) 0.5000 0.1932 0.4332 0.3413 8. The weight of cans of fruit is normally distributed with a mean of 1,000 grams and a standard deviation of 50 grams. What percent of the cans weigh 860 grams or less? (Points : 1)
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