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Evaluate 2-month moving average and Exponential smoothing by MAD.
The following data represents demand for company ABC's products for the last 10 months.
Months
Demand
1 2 3 4 5 6 7 8 9 10
450 463 520 500 510 516 534 525 530 534
(a) What is the forecast for month 11?
(b) Which provides a better forecast the two-month moving average or exponential smoothing? Explain using the mean absolute deviation.
Following sample data shows the weekly closing price of ABC stock. Compute the sample mean and variance from this data set.
Enter data into SPSS (use two columns: one for coding {0, 1, 2, 3, 4, 5} and one for DV)
Suppose the population standard deviations are not the same. At.05 significance level, is there a difference in mean waiting time?
Select the variable team salary and find the mean, median, and the standard deviation
The average score on the stat midterm was 75 points with a standard deviation of 5 points, and Gregor's z-score was -2. How many points did he score.
Suppose that you select a 50 families sample. Which is the form expected from the distribution of the average or median of the sample?
The following show the hours of sleep on weeknights for a sample of individuals age 49 and younger and for a sample of individuals age 50 and older.
Each egg was also measured for volume using a water displacement method. We wanted to know if the two methods agreed or not
A manufacturer of 35-mm cameras knows that a shipment of 30 cameras sent to the large discount store contains 8 defective cameras. The manufacturer also knows that the store will choose two of the cameras at a random, test them, and accept the shi..
Find out the probability distribution, and the cumulative probability distribution of car arrivals.
Otherwise you lose $1. If you make this wager very many times, what will be the mean outcome?
A banks loan officer rates applicants for credit. The ratings are causally distributed with a mean of 200 also a standard deflation of 50.
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