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Weekly demands at Hot Pizza are as follows:
Week
1
2
3
4
5
6
7
8
9
10
11
12
Demand ($)
108
116
118
124
96
119
102
112
92
91
Estimate demand for the next four weeks using a four-week moving average as well as simple exponential smoothing with a = .01. Evaluate the MAD, MAPE, MSE, bias and TS in each case. Which of the two methods do you prefer? Why?
question in 1999 lehman brothers estimated that 48 of its investment bank traders took diverse forms of soft drugs.
What is the difference between strong positive and strong negative correlation? Is there value in a strong negative correlation? If so, what? In your answer provide examples from your life.
Advertising coefficient is 200 and t stat is 1.75. Which of the following statements is an accurate interpretation of the situation when using an alpha of .10
Professor Cox needs a volunteer amongst 30 students in his statistical applications course. The average age of his students is 25 years, with the standard deviation of 3 years.
Confidence levels. If a higher con_dence level means that we are more confident about the number we are reporting, why don't we always report a confidence interval with the highest possible confidence level?
A certain component is critical to the operation of an electrical system and must be replaced immediately upon failure. If the mean lifetime of this type of component is 100 hours and its standard deviation is 30 hours, how many of the components ..
a sample of 12 radon detectors of a certain type was selected and each was exposed to 100 pcil of radon. the resulting
A normal population has a mean of 75 and a standard deviation of 5. You select a sample of 40. Compute the probability the sample mean is
In order that the sample proportion and the population proportion not differ by more than 0.05 with 95% level of confidence, what sample size should be used?
1. A regression analysis relating test scores (Y) to training hours (X) produced the following fitted equation: Yˆ =13.2 +1.3X . (a) What is the fitted value of the response variable corresponding to X = 8?
The ratings discussed in Problem 3 were constructed because the company felt that the moisture levels in the raw material were causing them to have problems in their plant. The data set rat ings2 . txt contains both the ratings and the correspondi..
Prepare a mixed integer programming model for this problem.
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