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Question: Use the sats98 dataset on the companion website.
a. Plot the relationship between average verbal (Verbal) and average math (Math) SAT scores in the 50 states. Describe the characteristics of the relationship.
b. What states are outliers? In what specific way are they outliers?
(a) At the 5 percent level of significance, does this sample prove a violation of the guideline that the average patient should pay no more than $250 out-of-pocket? State your hypotheses and decision rule. (b) Is this a close decision?
A company that offers courses to prepare would-be M.B.A. students for the GMAT examination has the following information about its customers: 20% are currently undergraduate students in business; 15% are undergraduate students in other fields of ..
Concern was expressed by the health educators that students with serum cholesterol levels above 200 might be at an increased risk of heart disease. If the campus was equally divided between males and females, how many students would be at increase..
Find the 93% confidence interval of the true mean. If a day care center were starting up and wanted to keep tuition low, what would be a reasonable amount to charge?
Consider the seven-component system shown in given Figure.- Find the reliability of the system after 1000 hours. What is the mean time to failure of the system?
In a random sample of 34 quarterback 2012 season ratings, the sample mean was = 57.09. Is there any evidence to suggest that the true mean quarterback rating has increased? Use a = 0.05 and compute the p value.
Test a hypothesis to see if this proportion has changed since 1985. I have the standard error and a t-score of 1.660. I need the test effect, test statistic and p-values.
Evaluate z statistic for the Wilcoxon rank sum test, standard deviation for the Wilcoxon rank sum test and P-value for the Wilcoxon rank sum test
Critically discuss the assumptions, if any, regarding a Chi-square test? What are the assumptions to apply linear regression?
At the .05 significance level, is there a difference in the proportion of viewers watching the three channels?
In an ABCNews.com nationwide poll done in 2001, the proportion of respondents who thought that it should be illegal to use a hand held cell phone while driving a car was 69 %. The poll's sample was 1027.
A marketing company performed a risk analysis for a manufacturer of synthetic fibers and concluded that new competitors present no risk 13% of the time, What is the range of the joint probability distribution of X, Y, and Z
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