Given a sample with a mean of 57 and a standard deviation of 14, find x such that Pr(X > x) = 0.715. Round your answer to two decimal places, e.g. 22.96.
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Given a sample with a mean of 57 and a standard deviation of 14, find x such that Pr(X > x) = 0.715. Round your answer to two decimal places, e.g. 22.96.
Sample means various elements selected from the population.
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- The number of pizzas consumed per month by university students is normally distributed with a mean of 6 and a standard deviation of 5. 1) What proportion of students consume more than 8 pizzas per month? 2) What is the probability that in a random sample of size 11, a total of more than 77 pizzas are consumed?There is a normal distribution with mean 10 and standard deviation of 8. What is the z-score of an observation equaling 15?Suppose that you are interested in determining the average height of a person in a large city. You begin by collecting the heights of a random sample of 256 people from the city. The average height of your sample is 64 inches, while the standard deviation of the heights in your sample is 4 inches. The standard error of your estimate of the average height in the city is (0.0001, 64, 0.25, 0.0156)