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Another way to communicate the result. Refer to the previous two exercises. Here is another way to communicate the result: teen gamers are 65% more likely to play on consoles than adult gamers.
(a) Explain how the 65% is computed.
(b) Use the bootstrap to give a 95% confidence interval for this estimate.
(c) Based on this exercise and the previous two, which of the three ways of thinking is most effective for communicating the results? Give reasons for your answer.
Assume that a 95% confidence interval estimate of the population mean annual starting salary is required. What is the planning value for the population standard deviation?
A sample of waterfall heights in Hawaii show that the average height is 261.5 feet with a standard deviation of 13.76 feet.
1.a researcher wants to know if calcium is an effective treatment for lowering blood pressure. he assigns one randomly
Calculate the mean of the 20 samples and draw a histogram showing the 20 sample means and describe the distribution of the x-bars that you see in part b (shape of distribution, center, and the amount of dispersion).
A ski company in Vail owns two ski shops, one on the east side and one on the west side. Sales data showed that at the eastern location there were 56 pairs of large gloves sold out of 304 total pairs sold.
a student asked to give a class demonstration of the use of an ordinary t-statistic confidence interval for comparing
The following data represent 25 successive subgroup averages and moving averages of span size 5 of these subgroup averages. The data are generated by a process that, when in control, produces normally distributed items having mean 30 and vari..
these cars would fall into the 22 to 27 mpg range? Compute the proportion of cars that get more than 28 mpg. What proportion of cars would get less than 23 mpg?
If the Diamond is drawn, the Diamond is set aside and not replaced (so that when the game continues there are only 3 cards in the hand).
Many variables influence the price of a company's common stock, including company-specific internal variables such as product quality and financial performance, and external market variables such as interest rates and stock market performance.
a brand of television has a lifetime that is normally distributed with a mean of 7 years and a standard deviation of
Draw a tree diagram depicting the sample space outcomes for this experiment.
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