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A large department store examined a sample of the 18 credit card sales and recorded the amounts charged for each of three types of credit cards: MasterCard, Visa and Discover. Six MasterCard sales, seven Visa and five Discover sales were recorded. The store used ANOVA to test if the mean sales for each credit card were equal. What are the degrees of freedom for the F statistic?
Determine her weighted mean grade? What letter grade did she earn? (A, B, C, D or F).
At 0.05 level of significance, is there evidence that proportion of claims processed under this new system is higher than article reported for previous system?
Consider the following data values of variables x and y. The equation of the least-squares regression line for this data is
Determine the largest village in terms of the population?
Find the test statistic . Find the standardize test statistic. decide whether the standardize test statist is in the rejection region and decide whether you should reject or fail to reject the null. Sample are random and independent. Claim u1 =u2,..
Draw suitable distribution curve indicating position of the TS and CV.
One advantage of the repeated measures ANOVA is that it eliminates "individual differences" as a source of variability. Explain why there are no individual differences in the numerator and in the denominator of the F ratio.
For the grand opening, an arena has selected 5 finalists, each of whom will win a season ticket located in one of 5 sections: The upper balcony, lower balcony, main floor, courtside, or a luxury box.
At a .01 level of significance, test whether there is a difference between the 2 sample means. Construct a 99 percent confidence interval estimate of the difference between the two sample means.
Prepare a 95% confidence interval for the average grocery bill. Would a 99% confidence interval be narrower or wider than the 95% confidence interval?
Define the rejection region. State the statistical decision.
A random sample of eight adults aged 30 years were asked how much they spent on medical costs in the year 2011. The following data were measured.
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