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A random sample of 20 vice presidents of Fortune 500 firms is taken. The amount each vice president paid in federal taxes as a percentage of gross income is determined. The data are
16.0 18.1 18.6 20.2 21.7 22.4 22.4 23.1 23.2 23.524.1 24.3 24.7 25.2 25.9 26.3 27.9 28.0 30.4 33.7
a. Compute the sample mean and median.
b. Compare the 20% trimmed mean; that is, delete the lowest 10% and the highest 10% of the data and find the mean of the remainder.
Please include any charts and graphs.
Construct a 90% confidence interval for the true mean weight. What sample size would be necessary to estimate the true weight with an error of plus or minus .03 grams with a
Completion of today's paper. If X denotes the number of papers belonging to seniors among those checked, will X have a binomial distributuin?
To the greatest number of decimal places in the printout, what is the least-squares regression line?- What proportion of the variation in rolling resistance is explained by th
Create a stem-and-leaf plot for the male speeds.- Create a histogram for the male speeds.- Compare the pictures created in (a) and (b) and the dotplot in Case Study.
A random sample of 70 printers discovered that a20 of them were being used in small businesses. Find the 99% limit for the population porportion of printers that are used in
Calculate numerical summaries including measures of central tendency such as mean and median and measures of variation including range and standard deviation.
What's the standard deviation of the difference in weights?- If a Normal model can be used to describe the difference in weights, what's the probability that the melon you go
At the 0.05 significance level, test the claim that the treatment (drug or placebo) is independent of the reaction (whether or not headaches were experienced).
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