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Develop a trend line for the demand for fertilizer using computer software.
Data collected on the yearly demand for 50 pound bags of fertilizer at Wallace Garden Supply are shown in the following table:
Year Demand for fertilizer (1000s of bags)
1 4
2 6
3 4
4 5
5 10
6 8
7 7
8 9
9 12
10 14
11 15
Determine the regression equation. Determine the coefficient of determination. Do you think Mr. Profit should be satisfied with using the size of the offering as the independent variable?
a. what is the point estimate of the population mean? b. what is the point estimate of the population standard deviation?
Explain why it might be important to look at cancer incidence that is age-adjusted rather than just cancer incidence. Perform simple linear regression on these data and report your finding.
Test at 5% significance level null hypothesis that population mean is 40 hours against alternative that it is higher.
A farmer in South Carolina must decide which crop to plant next year on his land: corn, peanuts, or soybeans. The return from each crop will be determined by whether a new trade bill with Russia passes the Senate.
Morality Study for a group of four men, the probability distribution for the number x who live through the next year is as given in the accompanying table.
The mean return for a random sample of 33 mutual funds is 14.93 percent with a standard deviation of 9.57. Build a 95 percent confidence interval for mu, population mean.
Compute the following: (Round the value for standard deviation and intermediate calculations to 2 decimal places and your final answer to 4 decimal places.)
If IQ scores on a Stanford-Binet Test are basically distributed with the mean of 100 and a standard deviation of 15, then about how many people in a randomly chosen million would be expected to score at 160 or above?
Using the p-value approach, test the hypotheses at the 1% level of significance.
Find the percentage of buyers who said their price range is between $150,000 and $153,300.
Which measure of family wealth is most important, when making political decisions, the national mean, median or mode?
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