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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.
Assume that the distribution of rs is approximately normal. Calculate the value of the test statistic and the p-value.
Dorsey Distributors has an annual demand for a metal detector of 1,400. The cost of a typical detector to Dorsey is $400.
table presents the thickness of a metal layer on 100 silicon wafers resulting from a chemical vapor deposition cvd
If he finds differences, then he may realize that, 1) he will need to evaluate his course ethnic sensitivity,
Let X1, X2, ... be independent, identically distributed random variables, which are also independent of N ? Po(?). Show that X1 + X2 + ··· + XN is infinitely di
What are the components of effective communication within your final project? What are some best practices that you think work most effectively?
the weight of a sophisticated running shoe is normally distributed with a mean of 12 ounces and a standard deviation of
the monthly incomes for 12 randomly selected people each with a bachelors degree in economics are shown on the
"Radiation Risk Overstated" reported in 2005 that women receiving radiation for breast cancer may no longer face an increased risk of potentially deadly
Community policing strategies have been useful in some jurisdictions to reduce crime. As Police Captain, you wish to run an experiment to see whether it will work in your city.
How would you develop the multiple regression equation using stepwise multiple regression?
Find the distribution of Tn, and compute E Tn and Var Tn. Remark. Customers arriving (and leaving) while the ATM is busy thus do not affect the service time.
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