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Perform an exponential smoothing forecast with α=0.3 with the following data. Use the demand for the month of January for the initial forecast.
Month Demand
January 21
February 23
March 34
April 32
May 33
June 35
July 30
August 26
September 24
October 25
November 26
December 28
What do confidence intervals represent? What is the most controllable method of increasing the precision of or narrowing the confidence interval
The top 25 companies ranked by market capitalization operating in the washington DC, area along with the year they were founded and the number of employees are given below.
A human society claims that less than 31% of U.S. households own a dog. In a random sample of 392 U.S. households, 155 say they own a dog. At a=0.03, is there enough evidence to support the society's claim?
What is the probability that the mean weight for a sample of 40 trout exceeds 405.5 grams?
Bob Billy is an operations analyst for Dollar-Does-It stores based in Iva, SC. He is currently studying the order and stocking policies for top-selling toy.
Computing the probability values using normal distribution - The data set has a bell-shaped distribution. Between what two prices do 68% of the houses lie?
Calculate the expected number of days it takes to get the order and standard deviation.
Construct the following confidence intervals for your data set:
She knows that 60% of the minerals have mass less than a certain amount m, and needs to select a random sample of n = 16 specimens for an experiment. With what probability will their average mass be less than the same amount m? (Hint: Calculate th..
Compare these with the percentages specified by Tchebysheff's Theorem.
What is the predicted GPA if a person watches 12 hours of television per week?
The athletic director claims that the atendance is the same as last year. What is the test value needed to evaluate the claim?
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