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Question: Mistake. A clerk entering salary data into a company spreadsheet accidentally put an extra "0" in the boss's salary, listing it as $2,000,000 instead of $200,000. Explain how this error will affect these summary statistics for the company payroll:
a) measures of center: median and mean.
b) measures of spread: range, IQR, and standard deviation.
the correlation between incidence of pancreatic cancer and alcohol consumption is 0.78 while the correlation between
1. a box contains 5 green 6 red 2 yellow and 8 blue marbles. four marbles are drawn from the box at the same time.a
The six differences (treatment minus control) had the mean = -0.326 and s = 0.181. Is there significant evidence of a difference between treatment and control?
A pair of dice is rolled once. Compute the probability that the sum is equal to each of the integers 2 through 12.
You are testing the null hypothesis that there is no linear relationship between two variables, X and Y. From your sample of 20, you determine that SSR = 60 and SSE = 40. Compute the correlation coefficient by first computing r squared and assuming..
Show that E[X|X>K] = Kα/(α - 1) for K large enough. Discuss the existence of this expectation as a function of α.- Derive an estimate of E[X|X>K] based on a sample from F.
Suppose that you have two biased estimators of the same population parameter. Estimator A has a bias equal to 1/n.
If the average tax payer who makes $140,000 per year owes the government $18,200 with a standard deviation of $1500, and the IRS receives a 1040 tax documents from a customer who earned $140,000 that claims he only owes $12,000, should the IRS sus..
Every laptop returned to a repair center is classified according its needed repairs: (1) LCD screen, (2) motherboard, (3) keyboard, or (4) other. A random broken laptop needs a type i repair with probability pi = 24-i /15. Let Ni equal the number ..
RELIABILITY OF MEDICAL TESTS A medical test has been designed to detect the presence of a certain disease. Among those who have the disease.
Assume that these two numbers are the averages of samples of 15 months each, and that both sample standard deviations are 50. Conduct a test for equality of means using the 0.05 level of significance.
Through your work in this unit, you have come to understand just how different quantitative and qualitative decision-making techniques are. Perhaps that is why a mixed methods decision-making technique could be characterized as drawing from the be..
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