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Statistical Summary and Article Critique
Your paper should in 500- 600 words 1) summarize the statistical methods that the researchers used in their article and 2) evaluate those statistical methods. Were the techniques they picked (correlation, hypothesis testing, regression, for example) appropriate? What limits to this approach are there? Are there other techniques they could have used instead?
Determine a 95% confidence interval for the mean battery lifetime assuming the population standard deviation is not known. Interpret it. What is the margin of error in this confidence interval?
Airline were reunited with the missing items by the next day. Does this cast doubt on the airline's claim? Use a calculator to find z-scores and P-values. Reject the null if P-value
A clinical study was performed to determine if a product was effective in alleviating side effects caused by a mode of treatment. In the treated group (100 subjects) it was found that 10% had side effect A, 15% had side effect B and 65% had side eff..
In each of the following situations, the sampling frame does not match the population, resulting in undercoverage. Give examples of population members that might have been omitted:
for an eight year period diane deposited 600 each quarter into an account paying 3.6 annual interest compounded
when the background music was slow the mean amount of bar purchases for a sample of 17 restaurant patrons was 30.47
What is the average age for each income group, and do the average ages differ for different income groups and what effect do gender and marital status have on annual income
there are 2r 2r is less than or equal to n gloves randomly chosen from n distinct pairs of gloves i.e. 2n gloves in
Report descriptive statistics, assumptions tests, effect sizes (partial eta) as well as tests of statistical significance.
suppose x the number of flaws in a roll of polyethylene insulated cable follows a poisson process where ? is 1.1 flaws
a random sample of 100 computer chips made by a manufacturer were inspected and 8 were found to be defective.a
1. The National Center for Health Statistics reports the following age breakdown of deaths in the United States during 2006. Source: The New York Times Almanac 2009, p. 392.
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