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A certain medication is known to increase the pulse rate of its users. The variance of the pulse rate is known to be 10 beats per minute. A sample of 32 users had an average pulse rate of 104 beats per minute. Find the 99% confidence interval of the population mean. Provide an interpretation of the confidence interval.
Find the value of sample covariance in linear regression model
Set up hypotheses to test if distribution of birthdays can be considered coming from uniform distribution.
Which of the following assumptions is not made for the F-test for comparing three or more means?
It is suspected that the mean turnover has changed and is not 6.0. Use the .05 significance level. Give the formula for the test statistic.
What is the total expected annual inventory cost at the optimal order quantity? What is the re-order point?
The trial failed to show significance. How many subjects would be required to detect the difference in proportions observed in the trial with 80% power?
Use the relative frequency approach to construct a probability distribution for the number of tests taken.
Compute the population attributable risk for smoking and lung cancer.
A marketing research firm wishes to estimate the proportion of adults who are planning to buy a new car in the next 6 months. A simple random sample of 100 adults led to 22 who were planning to buy a new car in the next 6 months.
One suggested environmental determinant of pediatric lung function is the level of cigarette smoking in the home. A researcher wants to do a pilot study with two groups:
Evolutionary theories often, Emphasize that humans have adapted to their physical environment. One such theory hypothesis that:
The heights of adults in one town have a mean of 66.3 inches and a standard deviation of 3.3 inches. What can you conclude from Chebychev's theorem about the percentage of adults in the town whose heights are between 59.7 and 72.9 inches..
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