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Suppose that you're charged with comparing results of standardized tests from four different school districts. What statistical technique would you choose to use? Explain what data you would use to do the comparisons.
The lifetimes of light bulbs of a particular type are normally distributed with a mean of 370 hours and a standard deviation of 5 hours. What percentage of bulbs has lifetimes that lie within 1 standard deviation of the mean on either side?
Estimate using three day weighted moving average. Estimate sales for the next day using a three-day weighted moving average where the weights
Assume the chief does not want his officers to cite a car for speeding unless they are 99% sure that it is travelling at 58 miles per hour or faster. What is the minimum estimate of speed at which a car should be cited for speeding?
Construct the 90 percent confidence interval for the proportion of checking account customers who have a Visa card with the bank. (Round your answers to 3 decimal places.)
The standard deviation of the sample is $3,000. Interpret your findings.
Compute the effect size with gender as the grouping variable and ADDSC as the dependent variable.
Compute the two groups using Paired sample t-test. Compute which modification reduced the number of traffic accidents
Develop a 95% confidence interval of the difference between the daily population means for the two airports.
Imagine that these results are disseminated to the general public through publication and media coverage. Write about one possible harmful consequence that these conclusions could have in the "everyday" world.
If a woman purchases Super Cola, what is the probability that it is a diet soda?
Using the data for women, complete an analysis of CHD incidence in women similar to the one completed for men.
Calculate the correlation coefficient and prediction equation.
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