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Assume that a sample is drawn and z(α/2) = 1.65 and σ = 35. Answer the following questions:
(A) If the Maximum Error of Estimate is 0.04 for this sample, what would be the sample size?
(B) Given that the sample Size is 400 with this same z(α/2) and σ, what would be the Maximum Error of Estimate?
(C) What happens to the Maximum Error of Estimate as the sample size gets larger?
(D) What effect does the answer to C above have to the size of the confidence interval?
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...
Critically discuss the difference among strategic, long-term, and short-term objectives? What is the relationship between objectives and goals? What are examples of this relationship?
Find a 90% confidence interval for the population mean weight of all such turtles.
By using the fact that Martha believes the treatment will decrease the amount of time to fall asleep, describe the null and alternate hypotheses.
Suppose we select a sample of 40 tires and use a simulator to determine the tread life. What is the likelihood of finding that the sample mean is between 59,050 and 60,950?
Determine the probability of a positive economic trend given an increasing employment. Are employment and economic trend independent?
The MBASAL file contains the salary offer (in thousands of dollars) received by each member of a sample of 50 MBA students who graduate from the graduate school of management at Rutgers
A computer is used and it is found that the P-value = 0.0016. What can you state about the sample (independent or dependent) and what can you conclude about the evidence?
Consider the following two economic characteristics with two possible outcomes each: employment (increase, decrease) and economic trend (positive, negative).
A filling machine in a brewery is designed to fill bottles with 355 ml of hard cider. In practice, however, volumes vary slightly from bottle to bottle. In a sample of 49 bottles, the mean volume of cider is found to be 354 ml, with a standard dev..
Ball bearings are manufactured with a diameter of 5 mm. But the process has variation, so the diameter is normally distributed with a mean of 5 mm and a standard deviation of .02 mm. A) What proportion of ball bearings are more than 5.03 mm?
(a) Find the range. (b) Find the variance. (Give your answer correct to two decimal places.) (c) Find the standard deviation. (Give your answer correct to two decimal places.)
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