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What is distribution variability and how is it linked to accuracy of statistical inference?
sketch a histogram showing the population distribution - locate value of the population mean in your sketch and make an estimate of the standard deviation.
What percentage of employees at the Bureau process fewer forms than Michael? What percentage of employees at the Bureau process more forms than Michael?
Joe thinks that no more than 20% of students in his Statistics class will get an A in the final examination. To prove his claim, he takes a random sample of 35 students and finds to his surprise that 30% of students got an A.
a researcher conducted a study that examined the proportion of high school students who cheated on tests at least twice
Determine a 90% confidence interval on difference in mean number of production units for two shifts. Compute 99% confidence interval for part A.
Auditor wants to be within 7% of true proportion when using 95% confidence level. How many files should auditor sample?
to evaluate the effect of a treatment a sample is obtained from a population with a mean of u 30 and the treatment is
What would be the correct null and alternative hypothesis for the following situation: The sample has a mean of 72.3 mph and a standard deviation of 7.4 mph. Use a 0.05 significance level to test the claim that the mean speed of all cars is greate..
Evolutionary theories often emphasize that humans have adapted to their physical environment. One such theory hypothesizes that people should spontaneously follow a 24-hour cycle of sleeping and waking
Residents of Mill River have fond memories of ice skating at a local park. An artist has captured the experience in a drawing and is hoping to reproduce it and sell framed copies to current and former residents.
Report descriptive statistics, assumptions tests, effect sizes (partial eta) as well as tests of statistical significance.
The State Game Commission set on length, if it is desired that 91% of the fish caught may be kept by fisherpersons? There is no limit on size for trout that exceed the minimum.
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