Assuming a normal distribution, what is the z-score associated with the 1st quartile? The 2nd quartile? The 3rd quartile?
Answer to relevant Questionsa. Find the standard z-score such that 80% of the distribution is below (to the left of) this value. b. Find the standard z-score such that the area to the right of this value is 0.15. c. Find the two z-scores that bound the ...As shown in Example 6.8, IQ scores are considered normally distributed, with a mean of 100 and a standard deviation of 16. a. Find the probability that a randomly selected person will have an IQ score between 100 and 120. b. ...Findings from a survey of American adults conducted by Yankelovich Partners for the International Bottled Water Association indicate that Americans on the average drink 6.1 8-ounce servings of water a day ...The weights of ripe watermelons grown at Mr. Smith’s farm are normally distributed with a standard deviation of 2.8 lb. Find the mean weight of Mr. Smith’s ripe watermelons if only 3% weigh less than 15 lb. Using the z(a) notation (identify the value of a used within the parentheses), name each of the standard normal variable z’s shown in the following diagrams
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