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What are the null and alternative hypotheses? What is the P-value? Reject or do not reject null hypothesis?
Listed below are measured amounts of lead in the air. The EPA has established an air quality standard for lead of 1.5 mg/m3. The measurements shown below were recorded at a building on different day
In the annual report, a major food chain stated that the distribution of daily sales at its Detroit stores is known to be bell-shaped, and that 95 percent of all daily sales fell between $19,200 an
It is estimated that 10% of the athletes competing in a large tournament are users of an illegal drug to enhance performance. The test for this drug is 90% accurate. Use a decision tree to determin
On a psychology exam with m = 76 and s = 12, Tom scored 9 points below the mean, Mary had a score of X = 70, and Bill had a z-score of z = -1.00. Place these three students in order from lowest to h
You are permitted to draw two marbles from an urn. you do so and the result is two black marbles. what is the probablity that the urn you drew from is that with no blue marbles.
Your name and that of a friend is included in a raffle drawing. For the raffle, two tickets will be drawn, and those whose names are on the tickets win a prize. Compute the following probabilities.
What is the linear correlation coefficient between square footage and asking price? r=?
Does his data suggest that insurance type and number of doctor's visits per year are related, using a 0.05 level of significance? Show your work.
Suppose random poll of 632 likely voters in Alabama found that 373 feel that daylight savings time should be abolished. What is a 90% confidence interval for the percentage of voters in Alabama who
In a sample of 270 households in a certian citym 210 had high speed internet access. can you conclude that more than 70% of the households in this city have high speed internet acces? round p to fo
In 2008, the per capita consumption in Country A was reported to be 8.3 kh or 18.23 pounds. Assume that the per capita consumption of coffee in Country A is approximately distrubited as a normal ran
Suppose that intrests rates offered for refinancing are normally distributed with a mean of 3.0% and standard deviation of 0.2%. What is the probability if you randomly select an offer that it will
Suppose the participants for jury duty are picked from a large pool of county residents with equal numbers of men and women. Among the last 20 participants there have been only 5 women.
The marketing research team of an investment corporation is trying to determine its target market for the promotion of a new financial instrument. the mean income of those surveyed for the first rou
A buyer for MSG must buy enough chicken tenders to supply all the concession stands around the arena during playoff time. historical data provides a guide to how many cases of chicken will be needed
Perform a hypothesis test at a significance level of 0.05 to test whether response times are the same for men and women at that company.
Consider taking a random sample of size 3 from a population of persons who smoke and recording how many of them, if any, have lung cancer. Let P (w/ a ~ on top) represent the wilson-adjusted proport
The quality technician randomly selected 50 bottles from the filling line. The mean amount of cola contained in the bottles is 64.5 ounces. Using the Please find the Z value. Please determine the pr
Assume that the population standard deviation was 2.5 strokes for both golfers. Test the hypothesis that there was no difference between the scores of the two golfers at the 1% significance level. S
Jack's game preserve is stocked with 30% moose, 25% elk, and 45% deer. Five years later, a sample of animals yields 90 moose, 75 elk, and 170 deer. At the 5% level, did the distribution of animals i
Which of the following is not a decision variable when formulating the project crashing problem as a linear program?
A research company claims that more than 55% of American regularly watch FOX News Watch. You decide to test this claim and ask a random sample of 425 Americans if they watch this program regularly.