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What is the difference between a causal model and a time- series model? Give an example of when each would be used.
What are some of the problems and drawbacks of the moving average forecasting model?
How do you determine how many observations to average in a moving average model? How do you determine the weightings to use in a weighted moving average model?
Choose one of the forecasting methods and explain the rationale behind using it in real-life.
Describe how a domestic fast food chain with plans for expanding into China would be able to use a forecasting model.
A study sponsored by American Express Co. and the French government tourist office found that old American stereotypes about French unfriendliness weren't true.
A sample of 25 concession stand purchases show a mean purchase of $5.29 with a standard deviation of $3.02. However, a later showing of the same movie, a sample of 25 purchases where the mean was $5.12 with a standard deviation of $2.14.
Draw the complete decision tree and determine whether the product should be launched or not.
At the .05 significance level, can we conclude that the mean waiting time is less than 3 minutes?
Listed below are measured loads (in lb) on the left femur of crash test dummies used in the same cars listed in the Chapter Problem. Use a 0.05 significance level to test the null hypothesis that the different car categories have the same mean. Do..
Conduct a mini-meta-analysis. There is really no such thing as a mini-meta-analysis, but you don't have time to conduct a full meta-analysis.
The formula for a 95% confidence interval yields the interval 640 ± 5.88. Find out whether each of the given statements is true or false.
Suppose wheat and sugar are two basic ingredients necessary to bake two items: a loaf of bread and a muffin. A baker has 25 pounds of wheat and 5 pounds of sugar.
A certain researcher thinks that the proportion of women who say that female bosses are harshly critical is greater than the proportion of men.
Write a sentence showing how the outcome of the hypothesis test and the measure of effect size would appear in a research report.
Test for single Proportion - Are the data consistent with the model? Answer yes or no, and explain briefly.
Random sample of round-trip discount fares on this route last month gives: At .01 significance level can we conclude that mean fare has increased? Determine the p-value?
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