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In cost estimation, the total cost of a project is the sum of component task costs. Each of these costs is a random variable with a probability distribution. It is customary to obtain information about the total cost distribution by adding together characteristics of the individual component cost distributions this is called the roll-up procedure. For example, E(X1 + ... + Xn) = E(X1) + ... + E(Xn), so the roll- up procedure is valid for mean cost. Suppose that there are two component tasks and that X1 and X2 are independent, normally distributed random vari- ables. Is the roll-up procedure valid for the 75th per- centile? That is, is the 75th percentile of the distri- bution of X1 + X2 the same as the sum of the 75th percentiles of the two individual distributions? If not, what is the relationship between the percentile of the sum and the sum of percentiles? For what per- centiles is the roll-up procedure valid in this case?
A start-up publishing company estimates that the fixed costs of its first major project will be $190,000, the variable cost will be $18, and the selling price per book will be $34.
Describe and interpret the results (including the coefficients). Include the linear regression equations. How do the R values in linear regression relate to the correlation coefficient in the case of age and height?
What is the level of measurement for there is no significant difference between marital ages of men and women? and ther eis a significant difference between marital ages between men and women.
how do i find the percentage of scores that fall at ornbspbelow a person with a score of 7? and percentage of scores
You calculate that their mean monthly rent is $613 and their standard deviation is $96. What are the degrees of freedom for a one-sample -statistic?
1.in the table below we examine the relationship between final grade and the reported hours per week each student said
You are given some information about a sample of data. It is known that the sample variance for this set of data is 10. You are also told that the sum of the squared deviations from the sample mean is 510 (see below). What is the size of this samp..
based on the following information compute population mean show your
a club has 200 members 45 of whom are lawyers 38 of the memebres are liars while 132 are neither lawyers nor liars.
Strongly support, support, no opinion, do not support, strongly do not support. The number of people in each category was recorded.
a simple random sample of 50 adults is obtained and each persons red blood cell count is measured. the sample mean is
a student wants to assess whether her dog muffin tends to chase her blue ball more often than she chases her red
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