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1. Margin of error. A corporate executive reports the re- sults of an employee satisfaction survey, stating that 52% of employees say they are either "satisfied" or "extremely satisfied" with their jobs, and then says "the margin of error is plus or minus 4%." Explain carefully what that means.
2. Margin of error. A market researcher estimates the per- centage of adults between the ages of 21 and 39 who will see their television ad is 15%, adding that he believes his estimate has a margin of error of about 3%. Explain what the margin of error means.
In the following table you can see the Memory Usage at a given moment of a PC computer. Find the measures of tendency and the measures of dispersion of the memory usage in Kb
Professor Smith's statistics midterm had a mean of 85 and a standard deviation of 8. If a student got a score of 73, what was the student's standardized (z) score? What is the probability of a normal random variable taking a value more than 1.6 sta..
Based on eight universities in each of two different regions, is there a difference between university rankings based on their regional locations? Perform a Mann-Whitney U test, being sure to follow the directions under the table.
description of the datasetwe will be using a dataset on neighborhood effects for this assignment.these data are drawn
The university policy department must write, on average, five tickets per day to keep department revenues at budgeted levels. Suppose the number of tickets written per day follows a Poisson distribution with mean of 6.5 tickets per day. Interpret ..
if two random samples of size 400 are drawn from two populations that have standard deviations of 60 and 8 respectively
Managers at the Dew Drop Inn are concerned about the increasing number of guests who make reservations but fail to show up. They have decided to institute a policy of over-booking like larger hotel chains
the centers for disease control and prevention reported a survey of randomly selected americans age 65 and older which
determine whether the following statement is true or false and explain brie y if a simple random sample is taken from a
Compute the p-value for this test using Excel's NORMSDIST function and draw the appropriate management conclusion.
Predictors YearHire (year when the individual was hired), Race (1 if individual is black, 0 otherwise), and Rank (1 if individual is an assistant professor, 0 otherwise). Interpret these results.
Determine (a) the 90% confidence limits, and (b) the 97% confidence limits for an estimate of the mean diameter of all the rivets produced by the machine in a day.
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