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A trucking firm suspects that the mean lifetime of a certain tire it uses is less than 35000 miles. To check the claim the firm randomly selects and test 54 of these tires and gets a mean lifetime of 34,570 with a standard deviation of 1200 miles. At a=0.05, test the trucking firms claim. Show all of your work, including the curve, write conclusion in language a layman can understand.
Compute standard error of mean? Compute the margin of error, with 95% confidence.
In ANOVA, what does F=1 mean? What are the differences between a two sample t-test and ANOVA hypothesis testing?
What is the probability that more than 265 will be relieved of the nasal condition?
Assume you always reject null hypothesis, regardless of any sample evidence. Determine the probabiliyt of Type II error? P(Type II error).
What should ING's General Counsel do to minimize ING's expected costs?
This distribution is positively skewed. The standard deviation of the population is not known.
Draw a column chart from grade book. Use column illustrating students' names; select one of the tests to plot.
Briefly state the evaluation criteria for using a computed regression equation; specifically, comment on the coefficient of determination, correlation coefficient, and standard error of the estimate.
Kannon Camera has developed a new camera that it claims can take an average of more than 10 photographs per second. You decide to evaluate the company's claim.
Five cards are drawn from an ordinary deck without replacement. Find the probability of getting:
It is better to use the median rather than the mean for a distribution when:
With this important detail, are there any significant differences with LSD?
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