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1.Refer to the time series data in Exercise 1. Using the average of all the historical data as a forecast for the next period, compute the following measures of forecast accuracy:
a. Mean absolute error
b. Mean squared error
c. Mean absolute percentage error
d. What is the forecast for week 7?
Using excel, construct a 90% confidence interval for the proportion of musicians who began playing while in elementary school.
do you drink the recommended amount of water each day? most americans dont on average americans drink 5.5 eight-oz
question a researcher believes that the percentage of people who exercise in california is greater than the national
The following data provided by a coffee company are the roast time in minutes for five batches of coffee (x) and the resulting shrinkage in percent of the coffee weight(y).
the following data were obtained from a survey of college students. the variablenbspxrepresents the number of
Students applying for admission to an MBA program must submit scores from the GMAT test, which includes a verbal and a quantitative component.
suppose that a and b are events defined on a common sample space and that the following probabilities are known. find
If a technical breakthrough occurred that raised the profit per unit of X 1 to $3, would this affect the optimal solution?
What is the z a/2 for a confidence level of 95%, the margin error of this sample and give a 95% confidence interval for the mean weight of boxes produced based on the sample mean of 16.4?
Develop a joint probability table for these data and use the table to answer the remaining questions. What do the marginal probabilities tell you about the age of the US population?
For this purpose, a random sample of 55 plots, each of size 100 square meters, is used. The number of ferromagnetic artifacts for each plot is determined.
if a student scored 7.5 in his exam while the class mean is 8.7 and the standard deviation is 1.1 how much percent of
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