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Adjusting for potential outliers. The examination of the residuals in part (c) of the previous exercise suggests that there may be two outliers, one with a high residual and one with a low residual.
(a) Because of safety issues, we are more concerned about underestimating PCB in a specimen than about overestimating. Give the specimen number for each of the two suspected outliers. Which one corresponds to an overestimate of PCB?
(b) Rerun the analysis with the two suspected outliers deleted, summarize these results, and compare them with those you obtained in the previous exercise.
If the standard deviation is $11,200, what can you say about the percentage of these workers who earn how likely is it that someone earns more than $100,000?
A box contains four tickets, one marked with a star and the other three blank. One draw is made from this box at random.
What can you conclude from these data? Did all the bacteria present in each saliva sample grow?
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.
List the possible realizations of the random vector; - Determine the probability of each realization; - Determine the mean vector;
two prison inmates communicate in binary by tapping on the adjacent wall. suppose that the probability of receiving a
Write a brief summary of the distribution of the area of homes.
1. given the following probabilities compute all joint probabilities to 2 decimals.pa .9pac .1pbnbspnbspa
minnesota lakes are full of walleye fish. the probability that a walleye could be caught in an attempt is 0.2. suppose
approximately 80 of workers are sure that they will be able to retire at 65 years of age. suppose 10 workers are
How might one relate Einstein's theory of relativity to mathematical perspective in art?
How many citizens would need to be sampled if a 99% confidence interval was desired to estimate the true proportion to within 1%?
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