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Question 1:
When a researcher has two samples with two means, one of the assumptions for two samples is independence of between the two samples. What does this mean? What happens if the independence assumption is violated?
Question 2:
What are the differences among a proportion, a percentage, and a ratio? When would a researcher use a hypothesis test for the difference in two population proportions? Explain.
c. Describe a different example of where the independent variable, while highly correlated to the dependent variable, does not cause the dependent variable to change directly. d. Discuss the differences and relationship between correlation and dete..
Determine the critical z values. Suppose that normal distribution applies. Right-tailed test; standard deviation = 0.04.
Construct a 99 percent confidence interval for the mean commission earned by local Tupperware dealers. You may assume the commissions are normally distributed.
a particular manufacturing design requires a shaft with a diameter between 19.88 mm and 20.018 mm. the manufacturing
List all samples of size 2, and compute the mean of each sample. Compute the mean of the distribution of sample means and the population mean. Compare the two values. Compare the dispersion in the population with that of the sample means.
The production department wants to explore the relationship between the number of employees who assemble a subassembly and the number produced. The complete set of paired observations follows:
Critically discuss the general characteristics of a research study for which an independent-measures t would be the appropriate test statistics
A life insurance company estimates that the probability that an individual in a certain risk group will survive one year is 0:99.
for your study on the food consumption habits of teenage males you randomly select 10 teenage males and ask each how
the average tenure of technicians at abc company is 10 years with a standard deviation of 5 years. calculate the
Suppose that the contestants are numbered 1 through 2n, and that whenever two players contest a match, the lower numbered one wins with probability p. Also suppose that the pairings of the remaining players are always done at random so that all po..
In a study, 37% of adults questioned reported that their health was excellent. A researcher wishes to study the health of people living close to a nuclear power plant.
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