A building contractor has a chance to buy an odd lot of 1,000 used bricks at an auction. She is interested in determining theproportion of bricks in the lot that are cracked and therefore unusable for her current project, but she does not have enough time toinspect all 1,000 bricks. Instead, she checks 150 bricks to determine which ones are cracked.What is the population of interest?all building contractorsall 1,000 bricks in the lotthe rest of the 850 bricksthe 150 bricks selected for inspectionthe rest of the 700 bricksWhat group constitutes the sample?the 150 bricks selected for inspectionall building contractorsthe rest of the 700 bricksall 1,000 bricks in the lotthe rest of the 850 brickSSubmit Answer

according to question, a building contractor has a chance to buy an odd lot of 1,000 used bricks at…

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Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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Dr. A. Ventura is interested in determining what kinds and how many pets people own in Bakersfield. He stands outside Petco and asks people what kind of pet they own. This is the result of his survey: dog=1; cat=2; bird=3; reptile=4; fish=5; other=6 1,1,2,2,2,1,1,3,2,3,1,1,1,2,2,4,4,2,2,1,1,1,5,4,3,4,1,1,1,2,2,6,1,1,2,2,1,2,1,2,6,3,4,5
The campus demographics state of 40 percent of students are male if there are 300 students, then how many are male?
An animal shelter has two purebred labradors among the 48 dogs available for adoption. It is also known that 7/8 of the dogs are mongrels. How many are purebreds?
A random sample of 600 people from a certain district were questioned and the results indicated that 30% used a particular product. In a second random sample of 300 people. 96 used the product. Using the data from the two samples, find the best estimate of the proportion of people in the district who used the product.
You are given thirteen identical- looking balls and a two-sided scale. One of the balls is of a different weight, although you don't know whether it's lighter or heavier. How can you use just three weighings of the scale to determine the different ball?
Huck Finn is interested in the average length of catfish in the Mississippi river bordering St. Louis. To collect his sample, Huck breaks the river into 5 regions and catches 8 catfish from each region. What method did Huck use to select his sample?
A firm randomly surveys 300 people out of the 3,000 people who have shopped in the store (only one location) in the last month and bought something. They are trying to determine how many people bought more than three items. The firm made sure that 50% were males and 50% were females. They found that 91 people bought more than three items and 209 bought three or less items. Which value represents the population? 3,000 300 91 Question 10 From the previous question what was the sample? 3000 300 O 91
It is harder to get into graduate programs in psychology or history? We randomly selected five institutions from among all U.S. institutions with graduate programs. The first number for each is the minimum GPA for applicants to the psychology doctoral program, and the second is for applicants to the history doctoral program. These GPAs were posted on the website of the well-known college guide company Peterson's. Wayne State University: 3.0, 2.75 University of Iowa: 3.0, 3.0 University of Nevada-Reno: 3.0, 2.75 George Washington University: 3.0, 3.0 University of Wyoming: 3.0, 3.0 1. The participants are not people, explain why it is appropriate to use a paired-samples t test for this situation.
A radio talk show host with a large listening audience is interested in the proportion p of adults in his listening area that think that the United States should not be at war in Afghanistan. He asks this question to his listeners "Do you think the United States should be at war in Afghanistan?" He asks his listeners to phone in and vote "yes" if they agree that the United States should be at war in Afghanistan and "no" if they disagree. Of the 100 people who phoned in 85% answered "yes". Which of the following assumptions for inference about a proportion using a confidence interval was violated? Select one: 1. The data are a simple random sample from the population of interest. 2.There appear to be no violations. 3. The sample size "n" is so large that both the count of successes n * p and the count of failures n(1-p) are 10 or more 4.The population is at least 10 times as large as the sample.
Suppose you have a job as a political poll person, approximately 130 million people voted in the last presidential election. How many people do you have to sample to be 95% certain you can identify a difference of 1%.

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