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Question: Executives at the Walt Disney Company are interested in estimating the mean spending per capita for people who visit Disney World in Orlando, Florida. Since they do not know the population standard deviation, they plan to use the t-distribution to conduct the test. However, they realize that the t-distribution requires that the population be normally distributed. Six hundred customers were randomly surveyed, and the amount spent during their stay at Disney World was recorded. These data are in the file called Disney. Before using these sample data to estimate the population mean, the managers wish to test to determine whether the population is normally distributed.
a. State the appropriate null and alternative hypotheses.
b. Organize the data into six classes and form the grouped data frequency distribution.
c. Using the sample mean and sample standard deviation, calculate the expected frequencies, assuming that the null hypothesis is true.
d. Conduct the test statistic and compare it to the appropriate critical value for a significance level equal to 0.05. What conclusion should be reached? Discuss.
he probability that a pumpkin seed will germinate is 70%. A gardener plants the pumpkins in batches of 12. What is the mean of the distribution? What is the variance of the distribution?
Find a 95% confidence interval for the true proportion of voters who approve of the way the government is being run.
The Nyquist plot of a conditionally stable system is shown in Figure P9.4 for a specific gain K. (a) Determine whether the system is stable, and find the number of roots (if any) in the right-hand s-plane.
according to cnn business partner careerbuilder.com the average starting salary for accounting graduates in 2008 was at
Describe a specific application of statistics that either has a direct effect on you or your life.
A standard set of dominoes contains 28 tiles, with each tile having two sides of dots from 0 to 6. Of these tiles, 7 have the same number of dots on each side. what is the probability that each chooses a tile with the same number of dots on each si..
Let V denote rainfall volume and W denote runoff volume (both in mm). According to the article "Runoff Quality Analysis of Urban Catchments with Analytical Probability Models" (J. of Water Resource Planning and Management, 2006: 4-14), the runoff ..
Urn I contains three red chips and one white chip. Urn II contains two red chips and two white chips. One chip is drawn from each urn and transferred to the other urn. Then a chip is drawn from the first urn. What is the probability that the chip ult..
Criticize the following definitions in light of the eight rules for lexical definitions:- "Faith" means reason succumbing to insecurity.
Conduct the standard hypothesis test procedure and answer the following: What is the null hypothesis? What is the alternate hypothesis?
Let X be a normally distributed random variable with mean 600 and variance 10,000. Find two values x1 and x2 such that P(X > x1) = 0.01 and P(X > x2) = 0.05.
Random sample of five North American adult is more than 7 hours a day? What is the probability that in random sample of 5 north American adults, all watch television more than 7 hours a day?
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