Confidence interval of the true proportion
A recent study of 200 people in Miami found 54 were obese. Determine the 95% confidence interval of the true proportion of individuals living in Miami who are obese?
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Use standard normal distribution to approximate. Seventy-seven percent of homes have a telephone answering device. In a random sample of 290 homes, what is the probability that 200 or less do not have an answering device?
Suppose that quarters have weights that are normally distributed with mean of 5.67 g and standard deviation fof 0.0700 g. If a vending machine is adjusted so that 15% of legal quarters are rejected due to their weights are too low, determine the m
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A bank's loan officer rates applicants for the credit. The ratings are normally distributed with mean of 200 and standard deviation of 50. If applicant is randomly chosen, determine the probability of a rating that is below 250 and above 300.
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Probability of at most 3 flaws in the randomly selected yard of cloth is? Standard deviation of number of flaws is the randomly selected yard of cloth is?
Test these hypotheses using alfa=0.05. What are your conclusions? Determine the P value for this test. Develop a 95 percent confidence interval on the mean shaft diameter.
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