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Suppose that n=275 numerical entries were drawn at random from a large accounting file of a major corporation. The first nonzero digits were recorded for the example.
First nonzero digit 1 2 3 4 5 6 7 8 9Sample frequency 83 49 32 22 25 18 13 17 16
Use a 1% level of significance to test the claim that the distribution of first nonzero digits in the account file does not follow Benford's Law. (In other words, is there an indication of accounting fraud?)
The number of gallons (measured in thousands of gallons) that this gas station sells per week. If Y = 340 - 90X, what is the expected value of the random variable Y?
First step of analytical hierarchy process doesn't include?
University officials at a major university would like to use three -term moving averages to examine enrollment. Enrollment data (in thousands of students) for the 12 most recent terms are shown in middle column of the table below.
Prove that there is a sequence of polynomials p_n on [0,1] such that p_n ----> 0 pointwise on [0,1] but the integral from 0 to 1 of p_n dx
Recently, students in a marketing research class were interested in the driving behavior of students. Specifically, the marketing students were interested if exceeding the speed limit was related to gender.
Using What's Best! (Or solver) find the least-cost matrix.
Categorize as simple, random, sample, stratified/systematic sample, cluster/convenience sample. List discharged hotel customers, divide them day their length of stay, and draw simple random samples from each group.
Construct a 95% confidence interval estimate of their mean weight.
A standard die has its faces painted different colors. Faces3,4,6 are red, faces 2 and 5 are black and face 1 is white.
From the given research, compare the major players better at batting than 20 years ago using five step hypothesis.
In a shipment of 79 vials, only 17 do not have hairline cracks. If you randomly select 3 vials from the shipment, what is the probability that all 3 of the selected vials have hairline cracks?
Describe the sampling distribution of the sample proportion
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