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What exact percent of the normal curve falls between the mean and -3 to +3 standard deviations from the mean? (Hint: the correct answer is not 100%)
What exact percent falls the normal curve falls below at Z score of -2.00? (Hint: The answer is not 95%).
The latter is a random variable (any function of a random variable is a random variable). So what"s the corresponding fact about conditional expectation?
Given jointly distributed random variables, X1 and X2, prove that, for any x2 and almost all x1 , FX2|X2(x2| x1) = Fx2(X2) if and only if X1 and X2 are independ
Determine the probability of choosing the area code at random which ends in the odd number if first digit cannot be 1 or 0?
Using a significance level equal to 0.01, what conclusion should you reach about the four manufacturers' printer cartridges? Explain.
What is the value of this statement in terms of the research process? What is the relevance and relationship of this statement to today's technology-advanced business world?
Draw the probability distribution of the number of red, white and blue balls in box 3.- What is the probability of the drawn red, white and blue balls in box 3?
48 or fewer will answer the question correctly. What is the z-score that you should look up in the z-table to find the desired probability?
A sample of 3000 observations has a bell-shaped distribution with a mean of 82 and a standard deviation of 16. Using the empirical rule, find what percentage of the observations fall in the intervals x-bar ± 1s, x-bar ± 2s, and x-bar ± 3s
For each of the following two sets of data, explain which one is likely to have a larger standard deviation.
Specify the sampling frame for this survey, and explain whether or not you think the problem of "using the wrong sampling frame" was a difficulty here.
IQ scores. The mean IQ for the entire population in any age group is supposed to be 100. Suppose the IQ scores of 31 seventh-grade girls in a Midwest school.
Determine the (Internal Rate of Return) IRR for the project using a financial calculator
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