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Compare 2-month moving average and exponential smoothing using 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.
At the .01 significance level, is there a difference in the use of the four entrances?
Which combination of factors produces smallest risk of Type I error?
In order to test the assumption of a Poisson distribution, a random sample of 150 ten-minute intervals was taken.
The daily numbers of calls received by the Internal Revenue Service office in July are shown below:
Find the area under the normal distribution curve between z = 1.52 and z = 2.43.
Create a 99 percent confidence interval for mean daily intake of milk. You may suppose daily intake amounts are usually distributed.
The number of standard errors that the sample estimate (p 1 - p 2 ) of (p1 - p2) falls from its null hypothesis value of zero is called
What is the probability that the project will be completed in 17 months or less?
At the 5 percent level of significance, does this sample prove a violation of the guideline that the average patient should pay no more than $250 out-of-pocket? State your hypotheses and decision rule.
Which of following statements would be right concerning a twotail test at 0.05 level of significance? We can conclude that average cottage cheese consumption in America is at least 0.705 pound more or less than 2.75 pounds per person per year.
Let p represent the proportion of registered voters in the state that would vote for the Republican candidate. The standard error for the proportion of those who phoned in who answered "yes" is
Establish a 99% Confidence interval about the difference in the proportion of the town voters and county voters who favor the proposal.
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