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1. The linear trend equation yˆ = 120 + 4.8x has been developed, where yˆ = estimated sales (thousands of dollars) and x = 1 for the year 1999. What level of sales would be forecast for 2013; for 2015?
2. An appliance repair shop owner has fitted the quadratic trend equation yˆ = 90 + 0.9x + 3x2 to a time series of annual repair orders, with y = the number of repair orders and x = 1 for 2005. Forecast the number of repair orders for 2013; for 2015.
3. Based on annual truck rentals over the years, a rental firm has developed the quadratic trend equation yˆ = 450 + 20x + 7.2x2, with x = 1 for 2005. Forecast y for 2013; for 2015.
4. When exponential smoothing is used in fitting a curve to a time series, the approach is slightly different from its application to forecasting. Compare the appro- priate formulas and point out how they differ.
a multiple choice test consists of 5 questions each with 4 possible answers. what is the probability that a student
please review the following real-world ratios for johnson amp johnson and pfizer for the year ended 2012 and address
How would you approach identifying the two correct time series in #1 to the proceed to merge them into one and make a weekly estimate of attendance?
Fully investigate the hypothesis that DVD revenues are larger on average when the box office revenue is in excess of $100 million. State all required assumptions, indicate your chosen level of significance (and why you chose it) and give a plain-E..
Assume that two samples are independent simple random samples selected from normally distributed populations. Use a 0.05 significance level to test the claim that male and female biology students speak the same mean number of words in a day.
If the z score is less than 0, what can be said of the corresponding raw score?
a survey was conducted of 611 office workers to determine telephone answering practices i.e how many were able to
Show that when n = 2, the multiplicative utility function is equivalent to the two- attribute multilinear utility function. (Hint: This is an algebra problem. You must show that one utility function is a scaled version of the other.
The bacteria Escherichia coli are commonly found in the human bladder. Suppose that 3000 of the bacteria are present at time t-0. Then t minutes later, the number of bacteria present can be approximated by:
The Institute for Operations Research and the Management Sciences
several years of study by dedicated researchers have shown that on average 4 sharks per month can be found in an area
a. Compute the mean quoted airfare. b. Compute the variance and standard deviation in airfares quoted. Treat the data as a sample.
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