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Total variance explained
Using the table above, answer the following questions:
(a) How many variables were there in this analysis?
(b) How many components have an eigenvalue above 1.00?
(c) How much variance has been accounted for in a three factor solution?
Test the claim at alpha-.05 that the average wage has not changed by finding the p-value for the test.
A random sample of 250 adults in a medium size college town were surveyed and it was found that 110 were regular voters. Estimate the true proportion of regular voters with 90% confidence.
the mean cost of a wedding is 28732. suppose the cost for a wedding is normally distributed with a standard deviation
A number of minor automobile accidents occur at various high-risk intersections. A study was done. Eight intersections were chosen at random. The number of minor accidents during a 6-month period before and after the modifications were:
A bettor with utility function U(x) = ln(x), where x is total wealth, has a choice between the following two alternatives: A. Win $ 10,000 with probability 0.2 Win $1000 with probability 0.8
Estimate the probability that X > 22 minutes - Show that the density for M is exponential with mean µ/n. Hint : Use cumulative distribution functions
Construct a 90% confidence interval for the true mean weight. What sample size would be necessary to estimate the true weight with an error of plus or minus .03 grams with a 90% confidence?
A Tamiami shearing machine is producing 10 percent defective pieces, which is abnormally high. The quality control engineer has been checking the output by almost continuous sampling since the abnormal condition began.
A cohort study was designed to look at the association of pesticides and the occurrence of childhood leukemia. Children living in rural areas were followed and leukemia rates were compared between those children living in areas with high and low p..
Suppose that in order to satisfy legal requirements, a meat pie manufacturer may only produce .2% of pies below a weight of 750grams. If the preceding holds and if the weight of all pies is normally distributed with a standard deviation of 50 gram..
How much profit/loss would you have since January 1, 2012 if you traded using long only trades beginning with the first signal after January 1, 2012 assuming you close out your position on the last date?
If the pairing is done at random, what is the probability that there are no white-black roommate pairs?
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