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Be a Simpson! Can you design a Simpson's paradox? Two companies are vying for a city's "Best Local Employer" award, to be given to the company most committed to hiring local residents.
Although both employers hired 300 new people in the past year, Company A brags that it deserves the award because 70% of its new jobs went to local residents, compared to only 60% for Company B.
Company B concedes that those percentages are correct, but points out that most of its new jobs were fulltime, while most of Company A's were part-time. Not only that, says Company B, but a higher percentage of its fulltime jobs went to local residents than did Company A's, and the same was true for part-time jobs.
Thus, Company B argues, it's a better local employer than Company A. Show how it's possible for Company B to fill a higher percentage of both full-time and part-time jobs with local residents, even though Company A hired more local residents overall.
They answered in 230 seconds per call with a standard deviation of $40. Can the company claim that they are faster than the average utility?
Give the name of the kind of sampling that was most likely used in each of the following cases: a Wall Street Journal poll of 2,000 people to determine the president's approval rating
Calculate and interpret two 95% confidence intervals to estimate the true mean Budget value. The first will assume normality and use a z-interval; the second will assume a t-interval.
1. in a hospitals shipment of 3500 insulin syringes 14 were unusable due to defects. is this sufficient evidence to
Question 1 A The data set oducat ion. dt a contains data on the years of education of a random sample of 718 Americans. as well as the same information for both of their parents. It is likely that parents' achievements have some predictive power f..
A cellular phone company is looking for ways to improve customer satisfaction. They want to select a simple random sample of four stores from their 15 franchises in which to conduct customer satisfaction surveys.
Based on your results what can you say about gender discrimination? Is this the causal evidence of gender on earnings? Why or Why not?
Question: What are two potential extraneous variables you need to be careful to consider?
the world series of baseball is to be played by team a and team b. the first team to win 4 games wins the series out
producers of pvc pipes want to have a supply of pipes sufficient to meet marketing needs. they wish to survey
morens department store has a special sale whereby each customer upon checkout chooses a random ticket that is labeled
Use 9 classes. Is the histogram approximately bell shaped and symmetic? Does this agree with the results predicted by the Central Limite Theorem?
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