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The average U.S. household has $178,600 in life insurance. A local insurance agent would like to see how households in his city compare to the national average, and selects a simple random sample of 30 households from the city. For households in the sample, the average amount of life insurance is , with $25,500.
a. Using a nondirectional hypothesis test and a level of significance of your choice, what conclusion would be reached?
b. For the significance level used in part (a), construct the appropriate confidence interval and verify the conclusion reached in part (a).
Critically discuss the purpose of developing a frequency distribution? What is the relationship between the relative frequency and the cumulative frequency? Could a frequency distribution contain qualitative data? Why?
Find a partially ordered set (X, ≤), with as few elements as possible, for which the hypothesis of Zorn's lemma holds (every chain has an upper bound) but which does not have a maximum.
a forester wishes to predict the volume in cubic feet of usable lumber in a certain species of trees from the height in
Currently, quarters have weights that are normally distributed with a mean of 5.670 g and a standard deviation of 0.062 g. A vending machine is configured to accept only those quarters with weights between 5.550 g and 5.790 g.
The quadratic model E(y) = β0 + β1x + β2x2 was fit to the data using MINITAB. The MINITAB printout is displayed. Conduct the test H0: β2 = 0 against Ha: β2 = 0 using α = .10. Give the conclusion in the words of the problem.
What is the probability of only product 1 becoming profitable?- only product 2 becoming profitable?- at least one of the products becoming profitable?
A regression model to predict Y, the state-by-state 2005 burglary crime rate per 100,000 people, used the following four state predictors: X1 = median age in 2005, X2 = number of 2005 bank- ruptcies per 1,000 people, X3= 2004 federal expenditures per..
the laurier companys brand has a market share of 30. suppose that 1000 consumers of the product are asked in a survey
a pair of dice is rolled 270 times. using the normal curve approximation what is the probability that a total of 7
Would you prefer to have your college or university run on the order of the medieval University of Bologna? Why or why not? In what ways is your college or university indebted to the medieval university?
Camera, 28% had a music player, and 22% had both. What is the probability that a cell phone sold last month had a camera or a music plaer?
Using the p- value approach, test the hypotheses at the 5% level of significance.
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