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Spam botnets. In Exercise you made a data set for the botnet data. Use that data set to compute the correlation between the number of bots and the number of spam messages per day.
Make a data set.
(a) Create a spreadsheet that contains the spam botnet data.
(b) How many cases are in your data set?
(c) Describe the labels, variables, and values that you used.
(d) Which columns give quantitative variables?
A company has 25 cars of this model. What is the probability that the mean nitrogen oxide emissions of these cars is above the 0.3g/mi limit?
A government survey conducted to estimate the mean price of houses in a metropolitan area is designed to have a margin of error of $10,000.
The distribution under the normal curve can be seen a lot in society, although you may not even notice it. Have you been watching the presidential candidate.
How heavy does a box have to be in order for the box to be labeled overweight?
A group of 47 randomly selected students have a mean score of 20.2 with a standard deviation of 4.6 on a placement test. Construct a 90% confidence interval for the mean score, , of all students taking the test.
Modify the regular one-sample Wilcoxon W by replacing the ranks 1, 2, 3, 4, 5, 6, 7, 8 by the scores 1, 1, 2, 2, 2, 2, 3, 3, to obtain W1. Compute the mean and variance of W1.
The University Bookstore is owned and operated by State University through and Independent Corporation with its own board of directors.
The remaining units were still running at 60,000 hours. Determine the following: Percentage of Failures? Number of failures per unit hour? MTBF at this point in testing?
One hundred eight Americans were surveyed to determine the number of hours they spend watching television each month.
If we desire batches that are 5% nonconforming to be accepted with a probability of no more than 0.04, which of the plans above would be preferable? Will the plan meet this criterion?
a. Estimate the standard deviation ofwhenx= 8. b. Develop a 95% confidence interval estimate of the expected value ofywhenx= 8.
If the restaurant stocks 400 hamburgers and 150 chicken sandwiches for a given day, what is the probability that it will run out of hamburgers or chicken sandwiches (or both) that day? Assume that the demand for hamburgers and the demand for chick..
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