Confidence interval from result
A company manager thinks he overpaying fertilizer at $174 per ton. To find out, he collects fertilizer prices per ton from five distributors. Construct a 90% confidence interval from his result : 128, 140, 170, 166 and 156
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What should the carnival operator set the bet at such that on average he makes $0.50 profit a game? (That is, so the player loses $0.50)
A grocery supplier believes that in a dozen eggs, the mean number of broken en eggs is 0.5 with a standard deviation of 0.2 eggs. You buy 3 dozen eggs without checking them.
Suppose we are given a probability distribution that has a mean if 9 and a standard deviation of 0.6. Use the Chebyshev inequality to find a lower bound estimate of the following probabilities:
For what percentage of the samples did you reject the null hypothesis?5) The population mean in this problem really is 100 because of the way we set up the calculator so the null hypothesis is true. We are testing the claim that the mean is not 10
Whats the company's expected profit on the policy? What's the standard deviation?
Find the mean (expected) number of times the lion will be successful. Find the probability the lion will fail to capture it prey at least 25 times.
A survey of 400 rural voters indicated that 250 favor annexation by the city. What is the margin of error for this survey at the 95% level of confidence?
The animal colony at a hospital contains 20 female rats and 30 male rats. Of the 20 females, 15 are white and 5 spotted. Of the 30 males, 15 are white, and 15 are spotted. Suppose that you randomly select 1 rat from this colony. What is the probab
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