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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.
What is the Standard Deviation of the Probability Distribution that would list the number of students (from 0 to 92) and the probability of each. If the answer cannot be calculated
You are the manager of a softball league in the locality in which there are 5 local teams with 10 people each. The league has been arranged for parity so that each local team has 5 good players and 5 bad players.
Comparison of paired and unpaired samples test - Prepare a brief conclusion statement summarizing your results. What can you tell this MHMR about client satisfaction? What could you suggest they do to improve?
What is the 95% confidence interval for the true mean length of the bolt?
Use Hypothesis testing to compute te correlation between these two variables and these it for significance. Test at .01 level of significance.
Suppose n = 1000 persons are to be sampled from this population and the sample proportion of married persons (ρ-hat) is to be calculated. What is the mean of the sampling distribution of ρ-hat?
A human resources director, on learning about the regression effect, decides to hire people who have been fired by their previous employer for poor performance.
Costs of Television: Listed below are prices (in dollars) and quality rating scores of rear-projection televisions. All of the televisions have screen sizes of 55 or 56 inches.
At the .01 significance level can we conclude the mean age is more than 8.4 years for the cars of university students? What is the p-value?
Testing equality of variances - evidence of a difference in the variability of monthly talking time on cell phones for men and women?
Obtain a test statistic and p-value assuming equal variances. Interpret these results.
A random sample of 10 miniature Tootsie Rolls was taken from a bag. Each piece was weighted on a very accurate scale. The results in grams were:
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