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Q1. You compute the components of a one-way ANOVA table, and you find MSB = 12 and MSW = 2. The critical value for the F test is 2.45. What is your test decision? A. Reject B. Accept C. We do not have enough information to make the test decisionQ2. You get a job at a financial services firm, and your new boss explains that they use some simple tools to track company performance. In one case, they average the investment returns generated by all of their account managers for the past 20 trading days. Then, the manager studies the variation in the mean return to evaluate the riskiness of the investments they have recommended to clients. Initially, the firm was small and had only 5 account managers, but the firm has grown and now employs 20 account managers. Based on this change in the number of account managers over time, what is the expected change in the variance of the mean investment return as the firm has grown? A. Variance in mean return has grown B. Variance in mean return has not changed C. Variance in mean return has declinedQ3. You are a marketing specialist for a regional grocery store chain. Suppose your data analysis shows that the amount of ice cream sold per week in your stores is positively correlated with the average daily high temperature for the week. Does this mean that the temperature causes the ice cream consumption? A. Yes, correlation indicates causation B. No, correlation and causation are distinctQ4. What happens to the value of a t-test statistic if the sample variance increases? A. Statistic does not change B. Statistic declines in absolute value C. Statistic increases in absolute valueQ5. When comparing the means of two independent samples, we must assume that the variances for the two samples are identical. A. False B. True
Suppose 31% offer both retirement plans and life insurance as benefits. If a small company is randomly selected, determine the following probabilties:
In the new poll, if the proportion favoring the incumbent has not changed, what is the mean and standard deviation of the number preferring the incumbent?
with loss function L(θ,a)= w(θ)(θ-a)^2, where w(θ) is a fixed weighted function. Determine the Bayes rule and comment on the role of w(θ) in this problem.
Find the sample proportions and test statistic for equal proportions. Is the decision close? Find the p-value.
Which of the following would be most helpful in assessing the practical significance of a test of hypotheses about a proportion?
How many games would the conference commissioner have to schedule each year - The ABCD football association is considering a Super Ten Football Conference. The top 10 football teams in the country, based on past records, would be members of the Sup..
A radio station that plays classical music has a "By Request" program each Saturday night. The percentage of requests for composers on a particular night are listed below:
Using the .01 significance level you will test to conclude if the analyst finds evidence that the boast of dealership A is correct. What will be your critical value?
On which test did he do better compared to the rest of the class?
q1. if you use a 0.10 level of significance in a two-tail hypothesis test what is your decision rule for rejecting a
Lemarks Studios is looking for advertiser dollars to help with production costs on its newest blockbuster movie. Lemarks Studios has several companies that want product placement in the film.
What is the degree of correlation between the dependent variable and the independent variable? Is the statistical significance of the model as a whole less than the desired statistical significance for the regression model? Explain the basis for yo..
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