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Suppose you have a stock portfolio where 28% of the stocks earned a return of 12.2%, 12% earned a return of 15.1%, 24% of the stocks earned a return of 0%, 18% of the stocks earned a return of -1.5%, and 18% of the firms earned a return of -3%.
(A) What is the average return?
(B) What is the variance of the returns?
(C) What is the standard deviation of the returns?
The mean time to expose a single panel in a circuit-board plant is two minutes with a standard deviation of 1.5 minutes. What is the natural coefficient of variation?
Identify a research question from your professional life or career specialization that can be addressed by an independent samples t test.
question in 1999 lehman brothers estimated that 48 of its investment bank traders took diverse forms of soft drugs.
mean grade point average. as part of a study of grade inflation you want to estimate the mean gpa of all current
Find the probability that fewer than 5 are satisfied with the airlines. (c) Find the probability that 8 or more are satisfied with the airlines.
an inspector correctly identifies defective products 90 of the time. for the next 10 products the probability that he
Many ?re stations handle emergency calls for medi- cal assistance as well as calls requesting ?re?ghting equip- ment. A particular station says that the probability that an incoming call is for medical assistance is .85. This can be expressed as P..
1. Most undergraduate business students will not go on to become actual practitioners of statistical research and analysis. Considering this fact, why should such individuals bother to become familiar with business statistics?
is the correlation between lot-r total scores and avoidance-distraction coping style statistically significant? is this
First, report the lowest magnitude correlation in the intercorrelation matrix, including degrees of freedom, correlation coefficient, p value, and effect size. Interpret the effect size. Specify whether or not to reject the null hypothesis for this c..
Test the hypothesis that the median weight of NFL players is 250 pounds against the alter- native that it is greater at α = 0.05, using (a) the large sample sign test and (b) the Wilcoxon signed rank test.
mileage tests were conducted on a randomly selected sample of 100 newly developed automobile tires. the results showed
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