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How many students would you include in a random sample to determine with 95% probability and to within 5% of the true value the proportion who arrive at 9am lectures without breakfast?
Looking at the data, you suspect that the manufacturer is incorrect in its label claim. You want to perform hypothesis testing to prove or disprove it.
Suppose normality, determine a 90% confidence interval for population variance.
The standard deviation is thought to be $750. How many card holders should be sampled? Your company charges a set dollar amount for each account in the sample.
A case-control study of relationship between liver cirrhosis among both non alcoholics and alcoholics. Describe whether smoking is confounder.
A defective picture tube was discovered in the latest shipment. What is the probability that it came from Tyson Wholesale?
Assume the first patient is assigned treatment A, and whenever there is a tie in marginal discrepancy, the next patient is assigned treatment A. Use w0 = 2 and w1 = 1. Show all you work.
Do you think they can be solved explicitly? Take the derivative of the gamma distribution and set it equal to zero and solve for alpha and beta to find the mle?
At one excavation site 8641 pot shards have been found that not yet been cleaned and identified. What is the probability that:
Determine r.m.s. error for regression prediction of height at 18 from height at 6.
Write a brief summary of the distribution of life expectancy.
Suppose that you are interested in determining the effectiveness of an intensive supervision program (ISP) for poor student performers. To examine its effectiveness, you keep track of 12 students entering an ISP for one year and tabulate the numbe..
Prepare an ANOVA table and test the null hypothesis of no linear relationship between the two variables.
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