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What are two examples of the data that would be used in the Wilcoxon Rank-Sum Test and Kruskal-Wallis Test?
Find an example of a poll based on a self-selected sample. Report the wording of the questions and the number who chose each response.
Determine the mean and the standard deviation of the 150 sample means, then compare these with their theoretically expected values.
If the tool manufacturer would like to be 95% confident that the sample proportion is within 0.01 of the actual population proportion, how many machinery rebuilding and repairing companies should be included in the sample?
Let sales be the independent variable and earnings be the dependent variable. Draw a scatter plot. Compute the coefficient of correlation Compute the coefficient of determination.
4. Although most of us buy milk by the quart or half gallon, farmers measure daily production in pounds. Ayreshire cows average 47 pounds of milk a day with a standard deviation of 6 pounds. For Jersey cows, the mean daily production is 43 pounds wit..
Construct and interpret a 95% confidence interval for the difference between female and male crossing times.- Comment on the assumptions and conditions.
A sample of twenty automobiles was taken, and the miles per gallon (MPG), horsepower, and total weight were recorded. Develop a linear regression model to predict MPG using horsepower as the only independent variable. Develop another model with weig..
an engine additive is being tested to see whether it can effectively increase gas mileage for a number of vehicles.
write a brief note to describe the following graphs including its useful to a particular variable or data.a bar graphb
Random sample of 150 viewers last night revealed 53 watched news on WNAE, 64 watched on WRRN, and 33 on WSPD. At .05 significance level, is there a difference in proportion of viewers watching three channels?
First, write out the expres- sion for the exact determination of the cut-off point, and secondly, use the CLT for its numerical determination.
What fraction of the variation in experience can be explained by the fact that some employees are older than others?
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