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Amanda has 400 feet of lumber to frame a rectangular patio. She wants to maximize the area of her patio. What should the dimensions of the patio be, and show how the maximum area of the patio is calculated from the algebraic equation by using the vertex form to find the maximum. Show the work when computing this equation.
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..
When a researcher has two samples with two means, one of the assumptions for two samples is independence of between the two samples. What does this mean? What happens if the independence assumption is violated?
Calculate chi-square for the cross-tab. Show your work. Is there a statistically significant relationship between these variables?
Do women and men have different opinions about affirmative action? Based on a sub sample of 2008 GSS, the output figure below shows respondent's sex (sex) and attitudes toward affirmative action (DISCAFF: Are whites hurt by affirmative action).
Answer to a problem based on statistical graphics.Create a c-bar chart and determine if corrective action is needed.
Descriptive statistics for given data - Evaluate the range, variance, and standard deviation of the data set. Interpret the results in the context of the real-life setting.
We are interested in determining whether or not the variances of the sales at two music stores (A & B) are equal. A sample of 10 days of sales at store A has a standard deviation of 30, while a sample of 16 days of sales from store B has a standar..
Suppose x follows a distribution with density function: f(x)=C*abs(x-2), 0 =
What is the expected value and variance for the number of contacts in eight attempts?
You are reviewing a scientific study where the epidemiologists sampled 1000 people from Charleston, South Carolina and measured variation at two loci, A and B.
You perform a one sample mean hypothesis test on a random sample of data and observe a p-value of 0.2157. What is the appropriate conclusion? Conclude at the 5% level of significance.
Two men are carrying a girl on a large plank that is 10m long and weights 200N. If the girl on a plank weighs 445N and sits 3m from one end, how much weight must each man support?
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