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Determine a confidence interval for the mean of a normal population with variance σ2 = 25, using a sample of size 500 with mean 22.
Given the following number of hours between breakdowns for 4 machines, are the machines significantly different? If so, how are they different? Which machine is the best? Which machine is the worst?
The quantity of the sample size has a significant influence on the standard error. Since n is the denominator of the standard error formula, as n increases, the standard error increases. The more data that you have, the more accurate you can be.
An achievement test is said to be reliable if a student who takes the test several times will consistently get high (or low) scores. One way of checking the reliability of a test is to divide it into two parts, usually the even-numbered problems a..
perform a sensitivity analysis on the following datapossible rampd costs for a phone company are best 20000 with a
the proportion of students in private schools is around 11. a random sample of 450 students from a wide geographic area
a bottling company is supposed to fill bottles with an average weight of 16 ounces. the company randomly selects
Todd is less interested in testing a hypothesis than he is in developing an estimate for what people would be willing to pay. He would like 95% confidence intervals for the average price people would be willing to pay
Suppose there are two samples of size 6 and 7, with a rank sum of 58 in the sample of size 6. Using the Wilcoxon rank sum test, evaluate the significance of the results, assuming there are no ties.
While 60 of the children's books are nonfiction. If a book is selected at random, find the probability of selecting the following not a children's nonfiction.
A cumulative frequency distribution is constructed from a frequency distribution by replacing each frequency with the sum of the frequency of the given class and the frequencies of all classes above it, and representing each class by its upper cla..
There were structural and design similarities between "Triumph" and "Dark Tower." Mr. Burten brought suit for fraud, breach of contract, and trade secret misappropriation. Can Mr. Burten recover underany of these theories? [Burten v. Milton Bradle..
for each of the following situations indicate whether anova is appropriate if not appropriate the reason why not and if
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