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1. The St. Paul Pioneer Press has assigned its one remaining reporter to write an article about gasoline prices in the Twin Cities area. While not busy covering local football games and wedding receptions, the reporter has designed and taken simple random samples of regular unleaded gas prices at 35 stations in Minneapolis and 35 in St. Paul.
What type of research design is the strongest when I what to adopt a new educational program? Using a pre-test and post-test with control group, the previous method but without the control group.
For the control group, the mean was 70.3 and the standard deviation was 8.3. (a) Do beta-blockers reduce the pulse rate? State the hypotheses and do a t test.
First part of this theorem allows a problem solver to compute probabilities about sample means regardless of whether a population is normally distributed.
Research shows that the life time of Everlast automobile tires is normally distributed with a mean value of 70,000 miles. What is the probability of having a tire that lasts more than 80,000 miles.
Using the .10 level of significance, can we conclude that the assembly time using the new method is faster?
Determine a forecast for the average weekly sales in year 5 for each of the three seasons.
Give an example of a polynomial with degree 3 such that when factored, it contains the two factors (x+5) and (2x-1), i.e., the polynomial looks like (x+5)(2x-1)(?).
Forecast 2 out of sample forecasts for the final model using following data: Final Estimates of Parameters AR 1 0.9647 0.0388 24.84 0.000.
Find the probability that when 236 reservations are accepted for Flight 179, there are more passengers showing up than there are seats available.
About one-third of the students entering a certain university drop out during or at the end of their first year." Does this statement illustrate percentage, proportion or probability?
People who answered incorrectly, 26 are men. The question was given to an equal number of men and women all with the same IQ. Find the probability that among 120 wrong answers, at least 82 made by men.
Concrete blocks are to be used in the foundations of several buildings. The specifications state that the minimum arithmetic mean compressive strength of a sample of blocks must be 1,000 pounds per square inch (psi).
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