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A researcher is asked to determine the likelihood that a new medication for arthritis works better than a similar medication that's been around for a decade. How would the researcher approach this assignment?
State a possible research hypothesis in the space below. Frame it as specifically as possible, in a testable way (so that we could use statistics to test the hypothesis).
What sort of subjects would the researcher want in his or her study?
What are the variables of interest, as well as the possible confounds and covariates the researcher should consider?
Describe the statistics that would be most applicable to test the hypothesis.
Discuss how the results of the statistical analysis might be statistically and/or practically significant.
Suppose that, in a sample of 200, we observe 140 successes. Is this sufficient evidence at the 1% significance level to indicate the the population proportion of successes is greater than 65%
A local health center noted that in a sample of 400 patients 80 were referred to them by the local hospital. a) Provide a 95% confidence level for all the patients who are referred to the health center by the hospital.
Suppose that 10 years ago the average annual expense for stock funds was 1.19 percent. Let µ be the current mean annual expense for all stock funds, and assume that stock fund annual expenses are approximately normally distributed.
A hypothesis states a difference exists between two populations. Sometimes this is an obvious conclusion because the means will be very different.
What are the assumptions of regression analysis and how do you evaluate them?
Take a random sample and perform a t-test against a population mean (no time series for any parts of this project.) Test a hypothesis about a population mean.
Discuss what is meant by mean, median, mode, variance, and standard deviation for a set of scores. Also mention under what circumstance you would use each of these.
Determine the probability that she lives in an all electric home?
Scores are obtained from the Law School Admission Test (LSAT) are normally distributed with a mean score of 550 and a standard deviation of 110.
The average age for all medicare patients in the USA is 75. A sample from a clinic shows that the average age of the clnic medicare patients is 78.
Develop a 99% confidence interval for the population mean household income, assuming a normal distribution.
Whenever the calculated value of t is equal to or greater than the tabled value of t, for a given number of degrees of freedom, then
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