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1. Chebyshev's vs. the empirical theorem/rule. 2. Discrete variables vs. Continuous variables
Statistics and Probability, Statistics
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Why is it that some people make very high returns on the stock market if it is so efficient? Is it more difficult to reconcile very high returns with efficient markets if the same people make extraordinary returns year a ...
A highway rest area contains a vending machine that dispenses cups of coffee. The amount of coffee that the machine provides when a purchase is made approximately follows a uniform distribution between 200 and 250 ml. (a ...
A study indicates that the weights of adults are normally distributed with a mean of 140 lbs and a standard deviation of 25 lbs. Find a value of weight x such that only 20% of adults weigh less than that. A. 136 B.190 ...
Suppose a sample space has things a,b and c. Twice, draw from the sample space and replace. The possible sequences formed are {aa, ab, ac,ba,bb, bc,ca,cb,cc} Now suppose there are Y different things. There are Y ways the ...
A group of students made the following scores on a 10-item quiz in psychological statistics: {5, 6, 7, 7, 7, 8, 8, 9, 9, 10, 10} What is the variance, treating these scores as a sample?
Plastic sheets made by a machine are periodically monitored for fluctuations in thickness. If the true standard deviation in thickness exceeds 2.0 millimeters, there is cause for concern about product quality. Past exper ...
Research research and Sample 5000 household concerning TV shows they watch. Based on the sample 18% reported watching 60 Minutes. What is the 95% confidence interval for the proportion of all Americans that watch 60 minu ...
A recent study reported that the prevalence of hyperlipidemia is 30% in children 2 to 6 years of age. If 12 children are analyzed what is the probability that at least 3 are hyperlipidemic?
Given the probability distribution function: x 0 1 2 Probability 0.25 0.50 0.25 a. Graph the probability distribution function. b. Calculate and graph the cumulative probability distribution. c. Find the mean of the rand ...
Assume that a firm could borrow 100 billion dollars. The most straightforward value from the leveraged recapitalization that people would estimate is the present value of interest tax shield. Assume the cost of debt is 0 ...
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