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Suppose the distribution of cholesterol levels for male undergraduates is approximately normal with mean 190 mg/dl and standard deviation 40 mg/dl. Suppose you take a sample 49 cholesterol level readings from this population.
(a) What is the population of the study?(b) What is the probability of selecting someone at random from this population who has a cholesterol value less than 180?(c) What is the mean and the standard deviation (error) of ?(d) What is the probability the mean cholesterol a level is less than 180?
We assume that the population is approximately normally distributed. Find the confidence interval: for a confidence level of 95%:
A CBS News/New York Times poll found that 329 out of 763 adults said they would travel to outer space in their lifetime, given the chance. Estimate the true proportion of adults who would like to travel to outer space with 92% confidence.
A friend of mine is giving a dinner party. His current wine supply includes 12 bottles of zinfandel, 10 of merlot, and 8 of cabernet. If he wants to serve 3 bottles of zinfandel and serving order is important, how many ways are there to do this?
Provide an example of an application of the normal distribution. Explain why standard normal distribution can be used to find the probabilities for all normal distributions?
At the 0.05 level of significance, using the critical value approach, is there evidence to suggest that the new mathematical model has improved process performance?
The Internal Revenue Service (IRS) provides a toll-free help line for taxpayers to call in and get answers to questions as they prepare their tax returns.
In the real world, a given null hypothesis is false; but the collected data lead to the null hypothesis being accepted. That is, the data lead to a failure to reject the null hypothesis.
A population that starts at 100 and doubles in growth every eight years: The expression would give the population t years after the growth starts.
Events A and B are mutually exclusive events defined on common sample space. If P (A) 0.5 and P (A or B) = 0.70, determine P (B).
Based on the results of the test, can the consumer group report in its next publication that the tires last less than 60,000 miles?
With a population standard deviation of $7810. Use α = 0.01 to test the researcher's theory. Assume wages in this industry are normally distributed, determine the 99% confidence interval of the population mean.
Describe the factors that might cause variation in weight of Tootsie Rolls during manufacture.
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