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Try 80% and 99%. Refer to the previous two exercises. Repeat the generation of 1000 intervals for the two other choices of confidence level, 80% and 99%. Report the percent hit for the 1000 confidence intervals generated for these two selections, and compare these with those you found in the previous two exercises. Write a short explanation of the meaning of the confidence level based on the four possible selections available in the Confidence Interval applet.
the bailey agency is studying long distance calls made from there office. they find that the length of calls follows a
a. Is it possible for a variance to be negative? Explain. b. What is the smallest value a variance can be? Under what conditions does the variance equal this smallest value?
A boxcar contains six complex electronic systems. Two of the six are to be randomly selected for thorough testing and then classified as defective or not defective. If two of the six systems are actually defective, find the probability that at le..
Why is "rounding-down" the LP solution the suboptimal way to solve Integer programming problems? Can you describe why?
Each week, employees perform an inventory for a sample of products. Certain products are selected and counted. The actual count is compared to the book count (the quantity in the records that should be in stock).
If 22.45% of the time the wind speed measurements are more than 11.6 miles per hour, what is the standard deviation of wind speed in St. Louis?
Use this information to develop a 95% confidence interval to estimate the production variance for the hourly wages of production workers in U.S. What is the value of upper limit of this confidence interval?
Using α = 0.05, does this sample provide enough evidence to conclude that the average utility bill in Delaware was lower in the winter of 2011-2012 than it was in the winter of 2010-2011?
Prove that if Romeo and Juliet are matched to each other under both the men's courtship and the women's courtship algorithms, then they are matched to each other under any stable matching.
For a random sample of 12 observations, the sample mean was 407 and the sample standard deviation 6. Using the .01 significance level: State the decision rule.
Which samples show unequal variances? Use α = .05 in all tests. Show the critical values and degrees of freedom clearly and illustrate the decision rule.
a pollster conducts a survey to determine the proportion of voters who favor his candidate. out of 1447 people surveyed
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