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A manufacturing process is designed to produce bolts with a 0.5-inch diameter. Once each day, a random sample of 36 bolts is selected and the bolt diameters are recorded. If the resulting sample mean is less than 0.49 inches or greater than 0.51 inches, the process is shut down for adjustment. The standard deviation for diameter is 0.02 inches. What is the probability that the manufacturing line will be shut down unnecessarily? (Hint: Find the probability of observing an x in the shutdown range when the true process mean really is 0.5 inches.)
given that the scores on a medical test follow a normal distribution with a mean of 460 and a standard deviation of
What recommendation would you have for each state to maximize revenue? c. Which state was most likely to be following a political unsupportable policy?
Graph the binomial distribution using a histogram and describe its shape. Identify any values of the random variable x that you would consider unusual.
The filling weight for boxes of cereal is designed to have a variance .02 ounces or less. A sample of 41 boxes of cereal shows a sample standard deviation of .16 ounces.
the population mean of monthly wages of all college graduates under age of 30. Interpret your answer in the context of the problem.
What is the null and alternative hypothesis (in symbols) for this t-test and use the appropriate t-test statistic?
Find the probability that student A made no mistakes when entering a randomly selected form. Find the probability that student B made no mistakes when entering a randomly selected form.
a recent study reported that the prevalence of hyperlipidemia defined as total cholesterol over 200 is 30 in children
What is the probability that the door will actually open. Supply a probability tree with your solution - what is the probability that the company makes a profit?
Suppose there are two samples of size 6 and 7, with a rank sum of 58 in the sample of size 6. Using the Wilcoxon rank-sum test, evaluate the significance of the results, assuming there are no ties.
Using α = .05 test for significance differences among the population mean wasted time for theses three urban areas. What is the p-value? What is your conclusion?
how does variablity in a population influence standard error of the mean? if you were studying the effect of puppies on
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