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The manager fo the Petroco Service Station wants to forecast the demand for unleaded gasoline next month so that the proper number of gallons can be ordered from the distributor. The owner has accumulated the following data on demand for unleaded gasoline from sales during the past ten months:
Month Gasoline Demanded (gal)
Oct 800
Nov 775
Dec 630
Jan 500
Feb 645
March 690
April 730
May 810
June 1,200
July 980
Compute an exponentially smoothed forecast using an symbol a which stand for a weighting factor referred to as the smoothing constant of a value of .30
Compute an adjusted exponentially smoothed forecast with a which stand for a weighting factor referred to as the smoothing constant =.30 and B.20
Compute the two forecast by using MAPD and indicate which seems to be more accurate
The various measures of central tendency: compare them (how they are similar) and contrast them (how they are different), including specific references to numbers, pictures, and tables derived from the data set.
Determine the critical path probability that project will be completed within?
Results are comparable to what could be expected in human serum. Are true binding percentages for five antibiotics tested all equal? Let α = 0.05.
Identify a research issue, opportunity, or problem that uses data that has absolute zero measurements. Some examples include a team member's stock portfolios performance
According to a hospital administrator, historical records over the past 10 years have shown that 20 percent of major surgery patients are dissatisfied with after-surgery care in the hospital. A scientific poll based on 400 hospital patients has ju..
Analysis of Variance (ANOVA) is used to test the equality of the means of three or more groups based on sample data. ANOVA is really a test of means even though it sounds like a test of variance.
Conduct the following test using 95% level of confidence.
A restaurant has an ice cream counter where it sells two main products, ice cream and frozen yogurt. The restaurant makes one order for ice cream and yogurt each week, and the store has enough space for 115 gallons of both products.
The sample mean of the number of spots on the 6000 rolls, should be about If this die is rolled 6000 times, the number of times we get a 2 or a 3 should be about
An F statistic is any statistic that follows an F distribution. Which of the following are true about F statistics and f distribution? Select all that apply
Assume that the smiling time of eight-week old babies, in seconds, follows a uniform distribution between 0 and 23 seconds, inclusive. This means that any smiling time from 0 to and including 23 seconds is equally likely.
A biased coin with probability of head being .6 is tossed 12 times. What is the probability that number of head would more than 4 but less than or equal to 10.
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