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It was found that during a period of 11 years in Hidalgo County, Texas, 870 people were selected for grand jury duty and 39% of them were Americans of Mexican ancestry. Among the people eligible for grand jury duty, 79.1% were Americans of Mexican ancestry. Use a .01 significance level to test the claim that the selection process is biased against Americans of Mexican ancestry. Does the jury selection appear to be fair?
Identify the null hypothesis, alternative hypothesis, test statistic, P-value or critical value(s), conclusion about null hypothesis, and final conclusion that addresses the original claim?
A month of sales data are collected on sales of different types of computer products Run the t-tests to determine:
Find the probability that the number of cars sold tomorrow will be between two and four (both inclusive).- Find the cumulative distribution function of the number of cars sold per day.
Comparing Computer Results. Refer to the Minitab display below. The probabilities were obtained by entering the values of n=6 and p = 0.0167.
Four graduating seniors, A, B, C, and D, have been scheduled for job interviews at 10 a.m. on Friday, January 13, at Random Sampling, Inc. The person- nel manager has scheduled the four for interview rooms 1, 2, 3, and 4, respectively. Unaware of ..
A Titanic disaster In 1912 the luxury liner Titanic, on its first voyage across the Atlantic, struck an iceberg and sank. Some passengers got off the ship.
Draw a scatterplot of y = price versus x = pages. Use different symbols for hardcover and softcover books.- For all 18 books, determine the correlation between price and pages.
In a speech delivered to parents on the launch anniversary of the Let's Move program, Michelle Obama made this claim: "The truth is that today, we have more choices than ever about how we live and eat, but so many of those choices simply aren't goo..
A single observation is to be used to test the null hypothesis that the mean waiting time between tremors recorded at a seismological station (the mean of an exponential population) is θ = 10 hours against the alternative that θ 10 hours. If the ..
SAT scores of students at an Ivy League college are distributed with a standard deviation of 250 points. Two statistics students, Raina and Luke, want to estimate the average SAT score of students at this college as part of a class project. They w..
The sample mean of the annual salaries of a group of 100 accountants who work at a large accounting firm is $130,000 with a sample standard deviation of $20,000.If a member of this group is randomly chosen, what can we say about the probability tha..
the manufacturer of a new line of ink-jet printers would like to include as part of its advertising the number of pages
Based on this info, how do I compute the posterior probabilities under each prediction, and determine if the study should be undertaken?
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