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Construct a scatterplot with the height on the x-axis and the weight on the y-axis. Find the correlation coefficent between the height and the weight. What does the correlation coefficient tell you about your data? Construct the equation of the regression line and use it to predict the weight of a person who is 68 inches tall.
Compare a three-month moving average forecast with an exponential smoothing fore-cast for a = 0.2. Which provides the better forecasts using MSE as the measure of model accuracy?
For the variables, HOME, ARREST, TENURE and SIBS, identify the correct measure of dispersion and explain why it is appropriate. Locate the values for the measure on the tables and report them for each variable
What is the difference between statistical significance and practical significance? Can a hypothesis test result be statistically significant and yet practically useless.
You plan to conduct a survey on your college campus to learn about the political awareness of students. You want to estimate the true proportion of college.
currently available medication is -9.4 minutes with a standard deviation of 2.8 minutes. Construct a 95% CI for the mean difference in times between the experimental and currently available medication.
Evaluate the regression assumptions of linearity and homoscedasticity by assessing your new residual plot. Be specific about your evaluation
Construct a 95% confidence interval for the mean number of riders on B1 busses. You can use a value of 10 for the sample standard deviation.
Verify that this assignment of probabilities satisfies the requirement that the sum of the probabilities for a discrete distribution must be 1.
Construct a graphic that shows the partition of the components of sums of squares in a one-factor repeated-measures ANOVA.
Suppose that the weather can be only sunny or cloudy, and that the weather conditions on successive mornings form a Markov chain with stationary transition
Revise the following paragraph to eliminate negative language. We cannot issue a full refund at this time because you did not enclose
Testing for defectives. Suppose a lot of 5 items contains two defective items. The items are tested one by one in random order.
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