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Suppose data collected from an experiment resulted in a significant ANOVA test.
Using the summary statistics and MSE = 8111.8, construct the Tukey 95% confidence intervals for all pairwise comparisons. Use these intervals to identify the significantly different population means.
Group
1
2
3
4
Sample size
16
18
21
9
Sample mean
476.3
450.2
698.2
597.6
The distribution of a sample of the outside diameters of PVC pipes approximates a symmetrical, bell-shaped distribution. The arithmetic mean is 14.0 inches, and the standard deviation is 0.1 inches.
suppose the average cholesterol level of children ages 2-14 is 175 mgdl with a standard deviation 30 mgdl. recently
1. you are tracking correlation of two funds fund a and fund b. examining current quarter data to date the probability
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odds makers try to predict which professional and college football teams will win and by how much the spread. if the
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Y is an random variable that equals one when an individual goes to college and zero when he or she does not. X is another random vari- able that captures the individual's quartile in the income distribution. Specically, X = 1 if the individual is ..
Determine the least-squares regression equation for y = next year's price/earning ratio estimate as a function of annual revenue growth. What would be the predicted value of y for a company whose annual revenue growth has been 150%?
in a bumper test three types of autos were deliberately crashed into a barrier at 5 mph and the resulting damage in
a) What is the value of the sample proportion p? b) What is the standard error of the sample proportion?
Conduct a hypothesis test and What is the calculated t value? Are the mean test scores of these two groups significantly different at the .05 level - Conduct a hypothesis test.
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