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Use the value of the linear correlation coeffient of determinatiom. what does this tell you about the explained variation of the data about the regression line? About the unexplained variation? r=-0.666.
What is the probability of a fatal accident over a lifetime? Explain your reasoning carefully. Hint: Assume independent events. Why might the assumption of independence be violated?
Consider the following stemplot. The mean of the data represented in this stemplot ?
Assuming that the Poisson distribution is a plausible model in describing variability of asbestos fiber counts in filters; derive a 95% confidence interval indicating the variability in the average number in asbestos fibers.
Many educators feel their grades should fit a normal distribution and often apply curves to make them fit one. One way to do this is to convert numeric grades to z scores using the mean and standard deviation for the grades, then use an equation s..
Calculate a value of lambda using the data from last week concerning the news networks and the reporting practices. Compare your resulting lambda to the resulting chi-square from last week.
Write a sentence showing how the outcome of the hypothesis test and the measure of effect size would appear in a research report.
The data below are the numbers of hours of homework done as reported by 24 high school juniors for the last week in September 2006.
At a 0.05 level of significance, determine if there is a significant difference in the mean weekly units of production for the three types of work schedules (perform all six steps of hypothesis testing and show the ANOVA table).
Determine the proportion of variation in grade that can be explained by the linear correlation between the grade and the number of credit hours earned at the same time of taking the course.
Using the basic informaion from above: If there are no additional customers waiting (or walking up to the counter) when a particular customer begins her transaction, what is the probability that no one will be waiting in line when her transaction ..
Assume duration of human pregnancies follow mound-shaped distribution with mean of 266 days and the standard deviation of 16 days.
Lead-time demand is 600 pounds. The standard deviation of lead time demand is 52 pounds. Supposing the lead time demand is normally distributed and that an acceptable risk of stocking out is 4%:
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