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A recent MBA graduate is trying to decide between two job offers, one in Omaha and one in Kansas City. One factor affecting his decision is the cost of a new home in each city. A recent study sampled 88 new home sales in the Omaha area and found that the mean selling price of a new home was $183,900 with a standard deviation of $35,800. A similar Kansas City study based on a sample of 65 new home sales found that the mean selling price was $178,500 with a standard deviation of $29,850.
Conduct a test at the .05 level of significance to determine if there is any difference in the mean selling price of new homes in Omaha versus Kansas City.
A die is rolled 60 times. An "ace" is the side with one dot. Use the normal approximation to estiate the chance of getting exactly 12 aces.
Time spent using email per session is normally distributed with μ = 8 minutes and σ = 2 minutes. a) What is the probability that the sample mean is between 7.8 and 8.2 minutes?
Run a multiple regression and interpret all the findings, R 2 , F, IV coefficients, and the intercept. Then in paragraph format, identify and report the following:
Setup the alternative hypothesis that will test the claim that the percentage of women preferring white wine is 25% higher than men.
Set up dummy coded dummy variables to contrast each of the other groups to Group 2, medium Anxiety; run a regression to predict exam performance (Y) from these dummy coded dummy variables.
A random sample of 20 single men was asked if they would welcome a woman taking the initiative in asking for a date. What is the probability that
Suppose that the average annual salary for a worker in the United States is $30,000 and that annual salaries for Americans are normally distributed with a standard deviation equal to $7,000. Determine the following:
Let Z be the random variable giving the number of times the second biased coin (coin #2) comes up heads. What is the probability mass function of Z? What is the mean and variance of Z?
Create a 99 percent confidence interval for mean daily intake of milk. You may suppose daily intake amounts are usually distributed.
Suppose that the results of the sample lead to rejection of the null hypothesis. Classify that conclusion as a:
The probability is 90% that the sample percentage is contained within what symmetrical limits of the population percentage?
Based on these results, the proportion of the variation in 1993 winnings that is explained by the average number of putts per round and driving distance
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