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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
Describe why the normal distribution can be used as an approximation to binomial distribution. What conditions should be met to use the normal distribution to approximate the binomial distribution? Why is a correction for continuity essential.
Explain the difference between multiple independent variables and multiple levels of independent variables. Which is better?
What contingency table test is used to see if there is a difference in the frequency distribution for two different groups?
A small company that manufactures computers computer received 10 shipments of the chips in lots of 20 chips from the manufacturer. what is the probability that there will be 2 shipments with at least one defective chip?
Due to financial hardship, the Nyke shoe company feels they only need to make one size of shoes, regardless of gender or height. They have collected data on gender, shoe size, and height
Through the week ending September 16,2011, tiger woods was the leading money winner on the PGA tour with total earnings of $5,517,777. Of the top 10 money winners, 7 players used a title it's brand golf ball. Suppose that we randomly select 2 of t..
By using the normal distribution to approximate the desired probability.
Describe the effect of an outlier or extreme value on the confidence interval - Find the probability that the return for common stocks
One characteristic of billiard balls is their elasticity - the bounce they get when striking one another. A manufacturer of billiard balls is testing three additives to the basic plastic.
Construct a 95 percent confidence interval for the population mean. Is it reasonable that the population mean is 28 weeks? Justify your answer.
Scrap rates per thousand (parts whose defects cannot be reworked) are compared for 5 randomly selected days at three plants. Does the data prove a significant difference in mean scrap rates?
The ages of cars owned by all employees of a large company have a bell shaped distribution with a mean of 8 years and a standard deviation of 2 years. Using the empirical rule, find the approx. percentage of cars (owned by those employees) that are b..
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