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Question: Redo problem using a two-tailed test. Did your results change? Compare the p-values of the two tests. Explain.
Problem: An article in BusinessWeek says: "Today companies use a mere 40% of their space."19 Suppose you want to disprove this claim, suspecting that it is an upward exaggeration. A random sample of the percentage used space for companies is 38, 18, 91, 37, 55, 80, 71, 92, 68, 78, 40, 36, 50, 45, 22, 19, 62, 70, 82, 25. Conduct the test using α = 0.05.
Some components of a two-component system fail after receiving a shock. Shocks of three types arrive independently and in accordance with Poisson processes. Shocks of the ?rst type arrive at a Poisson rate λ1 and cause the ?rst component to fail. ..
The accompanying sample consisting of n 5 20 observations on dielectric breakdown voltage of a piece of epoxy resin appeared in the article "Maximum Likelihood Estimation in the 3Parameter Weibull Distribution (IEEE Trans. on Dielectrics and Elec..
let u be a uniform 0 1 random variable. suppose that n trials are to be performed and that conditional on u u these
suppose that the u.s. government decides to charge beer consumers a tax. before the tax 25000 cases of beer were sold
Suppose that during a basketball practice. Joe tries 3 shots from the free throw line; imagine further that he has a probability equal to 0.6 of making each shot and that the attempts are independent. Let 'X' be the number of baskets he makes in t..
Interpret the following computer cross-tab output including a X2 test. Interpret the computer cross-tab output, including a Chi-square test.
In a large population of college educated adults the mean IQ is 118 with a standard deviation of 20 suppose 200 adults from this population are randomly selected for a market research campaign the probability that the sample mean IQ is greater tha..
A decision maker subjectively assigned the following probabilities to the four outcomes of a random experiment P(E1)=.10 P(E2)=.15 P(E3)=.40 P(E4)=.20, Are these probability assignment valid? Explain.
What sample size and acceptable level would result in a probability of .05 that a good batch will be rejected and a probability of .10 that a bad batch will be accepted?
Downs and Abwender (2002) found neurological deficits in soccer players who are routinely hit on the head with soccer balls compared to swimmers, who are also athletes but who are not regularly hit in the head. Is this an example of an experimenta..
Suppose you are given the following estimated regression equation: Debt Ratio = 4000 + .20 Cash Flow. If the t-stat for the slope estimate is 3.25, what can you conclude?
Suppose that the mean of the annual return for common stocks from 2000 to 2012 was 8.5%, and the standard deviation of the annual return was 25.2%.
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