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If the population standard deviation for the average loss was 16 tons per acre, determine the margin of error for estimating the mean loss per acre for a confidence level of 95% for sample sizes of farmers ranging from 289, 324 and 361. What would be your recommendation to the local Farm Bureau for estimating the average loss of production per acre, given the data you have at hand?
What distinguishes regression from ANOVA? What are the assumptions and limitations of each, and when should one be used in place of the other
Suppose {a_n} (n=1 to N) and {b_n} (n=1 to N) are two finite sequences of complex numbers. Let B_k = sum b_n (sum n=1 to k) denote the partial sum of the series sum (b_n) with the convention B_0=0.
What size sample would be required to estimate the proportion of unemployed college students if we want the margin of error not to exceed 5 percent?
A clothing retailer wishes to investigate the relationship between order size (in dollars) and the level of satisfaction of the customer.
In a sample of 80 mail carriers 16 had been bitten. At the 0.05 level of confidence, is there a significant difference in the proportions?
We can determine the following information about the amount remaining in a toothpaste tube without invading anyones privacy. How much toothpaste would you expect to be remaining in the tube?
Given the following data on Asian and European Share of U.S. Light Truck Sales(1990-2003): Which trend model is best, and why? If none is satisfactory, explain.
The population standard deviation is σ2 = 7. Test that the population means differ using a 1% significance level.
Event A occurs with probability 0.2. Event B occurs with probability 0.3. Event C occurs with probability 0.4. If A, B, and C are disjoint, then
Compute the score based on their appropriate class means and standard deviations:
At the .10 level of significance, is the coin biased toward heads? Show your decision rule and calculations.
Determine what analysis would you do on each problem (i.e., one-sample z-test, one-sample t-test, proportion test, two-sample independent t-test, or paired test)?
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