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The color distribution of plain M&M's varies by the factory in which they were made. The Hackettstown, New Jersey plant uses the following color distribution for plain M&M's: 12.5% red, 25% orange, 12.5% yellow, 12.5% green, 25% blue, and 12.5% brown. Each piece of candy in a random sample of 100 plain M&M's from the Hackettstown factory was classified according to color, and the results are listed below. Use a 0.05 significance level to test the claim that the Hackettstown factory color distribution is correct. Describe method used for calculating answer.
Red: 9
Orange: 27
Yellow: 11
Green: 14
Blue: 22
Brown: 17
A county has four major hospitals: 1) Regional Memorial; 2) General; 3) Charity; and 4) City. A multiple regression model is used to compare the time spent in the hospital after a heart by-pass surgery among the four hospitals.
1. use the standard normal table to find the z-score that corresponds to the given percentile. if the area is not in
Compare the lengths of the confidence intervals based on the mean and 20% trimmed mean. Why is the latter confidence interval shorter?
What percentage of the variation in their scores on the second round can be explained by their scores on the first round?
Last year, Tucker Electronics decided to try to do something about turnover among assembly line workers at its plants. It implemented two trial personnel.
Chlorine concentration in a municipal water supply is a uniformly distributed random variable that ranges between 0.74 ppm and 0.98 ppm.
There is pretty good chance average number of days absent would be 12 or more. That is what occurred to us - chance variation." Is this good defense? Justify the answer.
Test the hypothesis that the annual income of teachers in areas of more than 500,000 is significantly more than those in areas of less than 100,000. Use the 5% level of risk.
A bank has determined that the monthly balances of savings accounts of its customers are normaly distributed with an average balance of $1200 and standard deviation of $250.
You bet your friend that, of the next 15 automobiles to appear, at least two will have license plates beginning and ending with the same number. What is your pr
The num- ber of cases of peripheral neuropathy among a control group of 35 diabetic patients was 12. Among a group of 11 patients who were taking an oral agent to prevent hyperglycemia, there were three cases of peripheral neu- ropathy. Is the pro..
Develop a linear regression model to predict MPG using horsepower as the only independent variable. Develop another model with weight as the independent variable. Which of these two models is better?
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