Mathematics, 14.03.2020 02:59 hdhdhd49jdhd
(No R required for part 4b to 4f) Suppose that annual sales (in millions of dollars) of the Acme Corporation follow an AR(2) model: 2+ = 5 + 1.12t-1 – 0.5-2 + Wt, with 0 = 2. (a) Verify that this is a causal AR(2) model (you may use R to find the roots).(b) If sales for 2005, 2006, and 2007 were $9 million, $11 million, and $10 million, respectively, using one-step ahead prediction, forecast sales for 2008 and 2009.(c) Calculate 95% prediction intervals for your forecasts in part 4b.(d) Briefly explain, in words, why the prediction interval for the forecast in 2009 is wider than the prediction interval for the forecast in 2008.(e) If the sales in 2008 turned out to be $12 million, would this value surprise you?(f) Since we now know the sales for 2008 is $12 million, update your forecast for the year 2009.
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Mathematics, 21.06.2019 13:30
Describe the possible echelon forms of the standard matrix for a linear transformation t where t: set of real numbers is onto.
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Mathematics, 21.06.2019 16:30
Which of the following is the correct ratio for converting kilograms to grams
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Mathematics, 21.06.2019 20:00
In new york city at the spring equinox there are 12 hours 8 minutes of daylight. the longest and shortest days of the year very by two hours and 53 minutes from the equinox in this year the equinox falls on march 21 in this task you use trigonometric function to model the hours of daylight hours on certain days of the year in new york city a.what is the independent and dependent variables? b.find the amplitude and the period of the function. c.create a trigonometric function that describes the hours of sunlight for each day of the year. d. graph the function you build in part c. e. use the function you build in part c to find out how many fewer daylight hours february 10 will have than march 21. you may look at the calendar.
Answers: 1
Mathematics, 21.06.2019 21:20
In 2009, there were 1570 bears in a wildlife refuge. in 2010, the population had increased to approximately 1884 bears. if this trend continues and the bear population is increasing exponentially, how many bears will there be in 2018?
Answers: 2
(No R required for part 4b to 4f) Suppose that annual sales (in millions of dollars) of the Acme Cor...
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