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The mean weight of loads of rock is 49.0 tons with a standard deviation of 12.0 tons. If 9 loads are chosen at random for a weight check, find the probability that the mean weight of those loads is less than 47.6 tons. Assume that the variable is normally distributed.
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What score was earned by more students than any other score? Why? What was the highest score earned on the exam?
According to a recent survey of 500 randomly selected residents of Popular City, it was found that 38% are in favor of raising city taxes in order to build a new stadium for the local baseball team. (a) What is the population of interest of the su..
1. a researcher examines the records of all registered voters in one city and finds that 43 are registered democrats.
Please give an example on higher wages vs. education level using a sample population of 30 men and women. Compute the measures of central tendency, dispersion, and skew for your data
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A silver dollar is flipped twice. Calculate the probability of each of the following occurring:
Last fall, a sample of n = 36 freshman was selected to participate in a new 4-hour training program designed to improve study skills.
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Critically discuss the concept of the normal distribution, why it is important, and what you think it means. When students talk about "grading on the curve," how does that apply to the normal distribution?
the heights of 18-year-old men are approximately normally distributed with mean 68 inches and standard deviation 3
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