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Suppose we want to be accurate to within 0.25 pounds of the true breaking strength of our trash bags when using a 95% confidence interval. What is the minimum number of bags we should sample?
They wish to conduct a survey of their students and find a simple random sample of 50 Freshmen, 40 Sophomores, 35 Juniors, and 30 Seniors.
Can we compute the mean length of stay of workers at the company differs from the mean length of stay at that dangerous industry.
Suppose that an automobile manufacturer designed a radically new lightweight engine and wants to recommend the grade of gasoline to use.
Determine the number of monic irreducible polynomials of degree 4 in F_q without using the Moebius Inversion Formula.
Construct three scatter plots for: (1) percentage alcohol versus calories, (2) percentage alcohol verses carbobydrates, and (3) calories versus carbohydrates
A regional commuter airline selected a random sample of 25 flights and found that the correlation between the number of passengers and the total weight, in pounds, of luggage stored in the luggage compartment is 0.94.
A big part of regression analysis involves hypothesis testing. For example the t-score for b1 tests a hypothesis...what is the H0 and Ha for this hypothesis?
What sample size must be taken to estimate the average gas price in houston with 99% confidence and max error of 5 cents? Assume population standard deviation of gas prices is 60 cents.
Make a graph to display the distribution of doctors per 100,000 people.Write a brief description of the distribution.Are there any outliers?If so, can you explain them.
This set of height measurements are recorded in centimeters. Answer the following questions using the Histogram Applet. Is 1.7cm a Plausible mean value? Explain.
Derive an expression for the closed loop transfer function: Because the output is related to the actuating signal by G(s), we have
Using one mean Z test to test whether or not to support the claim - Is there evidence that the average hours is below 6? Describe.
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