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Zip Codes are arranged from east to west. Eastern states such as Maine have ZIP codes beginning with 0, running continuously to the Western states, where states such as California, Hawaii and Alaska have ZIP codes beginning with 9. If the first quartile, Q1, is computed from the list of all ZIP codes, does the result correspond to the location that is 25% of the distance from the location that is farthest east to the location that is farthest west? Why or Why not?
over the entire six years that students attend an ohio elementary school they are absent on average 28 days due to
does a follow-up reminder increase the renewal rate on a magazine subscription? a magazine sent out 760 subscription
The average number of television sets in the sample households turns out to be 1.86, and the SD is 0.86. Find a 95% confidence interval for the average number of television sets per household.
In an industry,200 workers,employed for a specific job,were classified according thier performance and training received/not received to test independence of specific trainig and performance.The dates is
doug needs to construct a 98 confidence interval for the mean diameter of 3 inch schedule 40 drain pipe. he samples 25
americans have become increasingly concerned about the rising cost of medicare. in 1990 the average annual medicare
What sample size must be taken to estimate the average gas price in houston with 99% confidence and max error of 5 cents? Assume population standard deviation of gas prices is 60 cents.
Estimate the mean number of cars per household for the population of households in the neighborhood. Give the 95% confidence interval.
In a few sentences, describe two designs that can address your research question. The designs must involve two different statistical analyses.
Random samples of five hundred units that were selected daily from a manufacturing process produced an overall defective rate of 3.5%. Calculate the lower and upper control limits for a percentage control chart.
Team Sports, Inc. sells sporting goods to high schools and colleges via a nationally distributed catalog. Management at Team Sports estimates they will sell 2,000 Wilson Model A2000 catcher's mitts next year.
A researcher claims that the average age of people who buy theatre tickets is 51. A sample of 30 is selected and their ages are recorded as shown below.
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