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1. It is claimed that two of three Americans say that the chances of world peace are seriously threatened by the nuclear capabilities of other countries. If in a random sample of 400 Americans, it is found that only 252 hold this view, do you think the claim is correct? Use α = 0.05. State any assumptions you make in solving this problem.
2. According to the Bureau of Labor Statistics (1996), the average price of a gallon of gasoline in all U.S. cities in the United States in January 1996 was $1.129. A later random sample in 24 cities found the mean price to be $1.24 with a standard deviation of 0.01. Test at α = 0.05 to see whether the average price of a gallon of gas in the cities had recently changed.
according to the texas department of state health services there are approximately 17.7 million adults age 18 living in
if tow televisions are randomly selected, compute the probability that both televisions work. what is the probability that at least one does not work?
At the 0.01 level, is the bank loan financially sound (should the bank ask for additional collateral)? What is the decision rule?
you want to give a bonus to the top 5 of your sales people and extra special attention to the bottom 25. average sales
you are investigating the role of physical activity in heart disease and suggest that physical activity protects
The lengths of Atlantic croaker fishes are normally distributed, with a mean of 9 inches and a standard deviation of 2.56 inches. An Atlantic croaker fish is randomly selected.
q1. a study is conducted to determine if time of day has any effect on test grades. an introductory psychology class is
Bob Nale is the owner of Nale's Quick Fill. Bob would like to estimate the mean number of gallons of gasoline sold to his customers.
In general how is the magnitude of the standard error of estimate related to the value of correlation?
recommendations regarding how long infants in developing countries should be breast-fed are controversial. if the
A wildlife biologist captures a certain species of geese in orer to weigh them. Using science, he determines that the weights are normally distributed with a mean of nine pounds and a standard deviation of 1.3 pounds.
Use exponential smoothing to forcast Aug. income. Assume that the initial forecast for Feb. is $65,000. The smoothing constant selected is x=0.1
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