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Data collected on the yearly demand for 50-pound bags of fertilizer at Wallace Garden Supply are shown in the following table. Develop a three-year moving average to forecast sale. Then estimate demand again with a weighted moving average in which sales in the most recent year are given a weight of 2 and sales in the other two years are each given a weight of 1. Which method do you think is the best?
If student is chosen at random, determine the probability that he or she is sophomore and owns a credit card.
Distinct random variable
Which of the following(s) can be considered (a) variable(s)?
Cores on two tests have a bivariate normal distribution; and that correlation of 2 scores is 0.8. Determine the probability that sum of the student's scores on 2 tests will be greater than 200?
Calculate chi-square for the cross-tab. Show your work. Is there a statistically significant relationship between these variables?
Looking at the data, the manufacturer is incorrect in its label claim. Perform hypothesis testing to prove or disprove it. Is the manufacturer correct in its label claim? Explain.
A regression model between sales (Y in $1,000), unit price (X 1 in dollars) and television advertisement (X 2 in dollars) resulted in the following function: = 7 - 3X1 + 5X 2 For this model SSR = 3500, SSE = 1500, and the sample size is 18...
At.01 significance level, is there relationship between job pressure and age?
Below is a plot of the Olympic gold medal winning performance in the high jump (in inches) for the years 1900 to 1996.
Why might driver be tempted not to use seat belt "just on this trip"?
What is the probability that the mean contents of a six-pack are less than 12 ounces and what is the chance I find at most two defectives in the sample
The hypothesis that the samples came from identical populations cannot be rejected, the T value is 16.5 greater that the lower limit.
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