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Describe a situation when you would prefer the median and the inter quartile range in describing a distribution over the mean and the standard deviation.
The selection is to be random, and at the school there are 8 tenured faculty members in accounting. What is the probability that the committee will contain?
Define validity and reliability. How can we insure our data is both reliable and valid? Which of these two do you think is the more important?
Explain the concept of "Regression Analysis", its types (3 types at least), applications and usefulness. Provide real application of its usage.
A small home-based company produces both hand-painted scarves and sweaters. The scarves take 2 hours of labor to produce, and the sweaters take 14 hours.
What proportion of kids aged 10-15 years is assumed to follow a normal distribution with a mean of 191 and a standard deviation of 22.4
Using the following 12 numbers (12, 34, 23, 10, 9, 45, 14, 34, 12, 13, 13, 35), calculate 1. the median 2. the mode 3. the mean
The residuals for Alaska in the original regression is above 50. Explain why it is not generally informative to judge the unusualness of an observation purely by the magnitude of its residual?
the joint probability mass function of x and y pxy is given byp1119p1219p130p2113p220p2316p3119p32118p3319compute exyi
What is the estimate of the proporation of employees who do not use the ATM in a month? Develop a 95 percent confidence interval for the mean number of transactions per month.
A project manager at COMSOFT corporation has collected statistics on the organization's software development process. He has the size of each project in number of lines of code for the past 20 projects and the number of lines of code in error disc..
Of all 3 to 5 year old children, 56% are enrolled in school. A sample of 500 children age 3 to 5 year old is ramndom selected. Find the probability that at least 250 children are enrolled in school.
At the .05 significance level, can we conclude that there is a difference in their mean times?
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