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What is the appropriate statistical analysis to use: t-test for two independent samples, t-test for two dependent samples, ANOVA, or chi-square test of independence? Please identify and explain why it is appropriate.
(a) A study was conducted to see whether monetary incentives to use less water during times of drought had an effect on water usage. Sixty single family homeowners were randomly assigned to one of two groups: 1) monetary incentives and 2) no monetary incentives. At the end of three months, the total amount of water usage for each household, in gallons, was measured.
(b) A study was conducted to see whether the mean weight loss is the same for 10 different weight loss programs. Each of the 10 programs had 50 subjects in it. The subjects were followed for 12 months. Weight change for each subject was recorded.
There are 2,000 eligible voters in a precinct. A total of 500 voters are randomly selected and asked whether they plan to vote for the Democratic incumbent or the Republican challenger. Of the 500 surveyed, 350 said they would vote for the Democra..
Conduct an analysis of variance test to show that there is evidence of an overall difference in population mean chick weights. Use a = 0.05.
question each part of this problem is a separate problem.a. usingnbsp adx in sas write down the runs for an experiment
One possible design to study the benefits to infants of breast milk would be a very large observational study.
What is the probability that a randomly selected person will be a Protestant and at the sametime be a Democrat or a Republican and what proportion of teenagers watch 16 to 18 hours of TV a week?
Suppose n unrelated people are gathered together. What is the smallest n for which chances are >50% that there will be two or more people born in the same calendar month?
What's the approximate probability that more than one third of this sample wear contacts?
a test for a certain disease is found to be 96 accurate meaning that it will correctly diagnose the disease in 96 out
quality control is an important issue at acme company which manufactures light bulbs. in order to conduct testing of
Suppose the annual consumption of chicken mean is 20.84 pounds per person and that the standard deviation for the consumption of chicken per person is 9.193 pounds.
What are companies doing to decrease the stress levels of their employees? To what degree do you think that these steps will help them retain valued employees
When, in a criminal court, a defendant is found "not guilty," is the court saying with certainty that he or she is innocent? Explain.
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