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Outliers
a. In your own words, describe to someone who knows only a little statistics how to recognize when an observation is an outlier. What action(s) should be taken with an outlier?
b. Which measure of the center (mean or median) is more resistant to outliers, and what does "resistant to outliers" mean?
can students save money by shopping for textbooks at amazon.com? to investigate this possibility a random sample of
Find the expected frequency for the given Contingency Table, where the Observed frequency is 88 and 10. Use a 0.05 significance level to test the claim that getting an infection (cold) is independent of the treatment group. What does the result in..
To model this fact, we assume that only half of the goods produced during a week can be used to meet the current week's demand (assume that all of the prior week's ending inventory can be used to meet the current week's demand). Determine how to m..
According to a recent Gallup survey, 93% of teens use the Internet, but there are differences in how teen boys and girls say they use computers.
a study on students drinking habits asks a random sample of 40 greek ones who belong to a fraternity or sorority uf
a medical device manufacturer claims to have developed a thin aicd that contains a mean of no less than 41 joules of
Student record revealed that 16 out of a random sample of 64 of student with loans. It supposed that current rate is persisting across all students. Compute probability that number of students with loans will be less than 375.
Draw a picture of the distribution of these verbal SAT scores, indicating the cutoff points for the middle 68%, 95%, and 99.7% of the scores.
seventy percent of the bicycles sold by a certain store are mountain bikes. among 100 randomly selected bike purchases
a. Find the distribution of the project duration. Report the mean and the standard deviation. b. If the project duration exceeds 250 days, a penalty will be assessed. What is the probability that the project will be completed within 250 days?
Also report a 95% confidence interval for the difference in proportions (2007 versus 2010) and explain what information is provided in the interval that is not given in the significance test results.
7 squirrels were found to have an average weight of 9.4 ounces with a sample standard deviation is 0.9. find the 95
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