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(a) Combining the data for both lathes in Exercise 112, construct a histogram.
(b) How would you describe the shape of the histogram?
Exercise 112
Two different lathes turn shafts to be used in electric motors. Measurements made of their diameters (in cm) are
Construct two stem-and-leaf diagrams to see if you should suspect that the two lathes are turning out shafts of different diameters.
cola makers test new recipes for loss of sweetness during storage. trained tasters rate the sweetness before and after
In each of the following data problems there is some potential violation of one of the independence assumptions. State whether there is a cluster effect or serial correlation, and whether the questionable assumption is the independence within g..
These systems will require $1,000,000 in Intel CPUs. Currency risk Suppose that current exchange rate is 1.0 Real/$US. What happens if the exchange rate increases to 2.0 Real/$US?
Determine the z values for 29 and 34 hours. What percent of the garages take between 32 hours and 34 hours to erect?
The speed of cars passing through a checkpoint follows a normal distribution with μ = 62.6 miles per hour and σ = 3.7 miles per hour. What is the probability that the next car passing will ...
q1. given the following data compute the mad for the forecast. nbspnbspnbspnbspnbspnbspnbspnbsp
Construct a 95 percent confidence interval for the population proportion of positive drug tests. Why is the normality assumption not a problem, despite the very small value of p?
A laboratory tested 70 chicken eggs and found that the mean amount of cholesterol was 229 milligrams with s = 19.9 milligrams. Construct a 95% confidence interval for the true mean cholesterol content of all such eggs.
Recognize and describe potential threats (up to 3) to internal validity.
Find out whether or not right-hemisphere damage results in significantly reduced performance on spatial skills task. Test with alpha set at .05 with one tail.
Rerun your analysis in (a) using hospital and the condition of the patient as explanatory variables. Summarize the results of your analysis and give a 95% con?dence interval for the odds ratio of Hospital A relative to Hospital B.
a real estate agent has appointments with eight prospective clients. from past experience the agent knows that the
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