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A pet store owner wishes to determine whether the type of pet a person selects is related to [10] the individual's gender. The data is shown below:
Dog Cat Total
Male 36 14 50
Female 25 5 30
Total 61 19 80
Atα= 0.01, is the gender of the purchaser dependent of the type of pet purchased?
The May 1, 2007, College Retirement Equity Fund (CREF) prospectus lists the following sample returns on $1 invested in two of the fund's accounts, per year.
In a survey conducted to see how long Americans keep their cars, 2000 automobile owners were asked how long they plan to keep their present cars. The results of the survey follow. Find out the probability distribution associated with these data.
Five homes are selected at random: What is the probability none of the six selected homes have a security system? (Round your answer to 3 decimal places.)
Assuming that this value is the mean of a normal distribution, and that the standard deviation of the distribution is 3%, what is the value of private consumption as share of GDP such that you are 90% sure that the actual value falls below it?
Calculate a 90% confidence interval for the proportion of vehicles being use for carpooling. Use formulas to solve.
a. State two possible reasons for this observed high number of runaway vehicles. b. Why do you think Toyota issued this recall?
A certain airplane has two independent alternators to provide electrical power. The probability that a given alternator will fail on a 1-hour flight is .02. What is the probability that (a) both will fail? (b) Neither will fail? (c) One or the oth..
A random sample of 250 adults in a medium size college town were surveyed and it was found that 110 were regular voters. Estimate the true proportion of regular voters with 90% confidence.
A trans-oceanic airline conducted a study to determine whether the average weight of baggage checked by a passenger differs significantly from 45 pounds.
In a forest, the number of trees that grow in a region of area R has a Poisson distribution with mean AR, where A is a positive real number.
Under what situations on lambda1 and lambda2 will this system have the steady state distribution? Describe your answer.
question 1 what is the difference between the chi-square test for goodness-of-fit and the chi-square test for
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