2.1.1In each of the following examples, identify the population, thesample, and the research variable.a. To determine the total amount of error in all students' bills, alarge university selects 150 accounts for a special check ofaccuracy.b. A wildlife biologist collects information on the sex of the 28surviving California condors. (When this question was written,there were only 28 surviving California condors.)c. An organic chemist repeats the synthesis of a certaincompound 5 times using the same procedure and each timedetermines the percentage of yield.d. The Census Bureau distributes a special questionnaire to 1 outof every 20 households in the census and among other questionsinquires about the number of rooms in the dwelling.e. A manufacturer examines the records of each of its employeesto determine how long each one has worked for the company.

As per the Bartleby guildlines we have to solve first three subparts and rest can be reposted.Given…

Answered: 2.1.1 In each of the following…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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1) The data below come from a study that investigated the usefulness of MRI to diagnose breast cancer. Of the 650 women in the study, 13 had breast cancer, and the MRI exam detected breast cancer in 12 of these women. Of the 637 women who did not have breast cancer, the MRI correctly identified that no cancer was present for 547 of them. The accompanying table summarizes this information. Breast Cancer Present Breast Cancer NOT Present Total MRI Indicated Breast Cancer 12 90 102 MRI Did NOT Indicate Breast Cancer 1 547 548 Total 637 650 Suppose that an MRI exam is used to decide between the two hypotheses. HO: A woman does not have breast cancer. Ha: A woman has breast cancer. A. In the context of this problem explain what a Type I error would mean B. In the context of this problem explain what a Type II error would mean.
1. Mark 30 small pieces of paper with an A, a B, or a C. Put the pieces of paper in a bag. Trade bags with other students in the class. a. Generate a sample by choosing a piece of paper from your bag 10 times, replacing the piece of paper each time. Record the number of times you choose each letter. Repeat this process to generate five more samples. b. Use each sample to make an estimate for the number of As and Bs in the bag. Then describe the variation of the six estimates. Make estimates for the numbers of As, Bs, and Cs in the bag based on all the samples. c. Take the pieces of paper out of the bag. How do your estimates compare to the population? Do you think you can make a more accurate estimate? If so, explain how.
In a memory test, the test subjects are given a large number and are asked to memorize it. Historical records show that 80% of test subjects pass the test. To pass the test, a subject must exactly repeat all the digits in the number after two hours. A random sample of 625 people to take the memory test is going to be chosen. Let p be the proportion of people in the sample who pass the test. Answer the following. (If necessary, consult a list of formulas.) (a) Find the mean of P. 0 (b) Find the standard deviation of p. 0 (c) Compute an approximation for P(P >0.84), which is the probability that more than 84% of the people in the sample pass the test. Round your answer to four decimal places. 0 X
2. Which of the following statements are false? A. In enumerative studies, interest is focused on a finite, identifiable, unchanging collection of individuals or objects that make up a population. B. "All companies listed on the New York Stock Exchange" is an example of a sample. C. A sampling frame is a listing of the individuals or objects to be sampled. D. "All possible yields (in grams) from a certain chemical reaction carried out in a laboratory" is an example of conceptual or hypothetical population.
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Determine the sample size associated with the following formula. Remember to always round up to the next highest whole number. ?=[(1.96)⋅(3.56)0.16]2n=[(1.96)⋅(3.56)0.16]2
Question 23 Read and solve the problem; choose the best answer from the choices provided. At a college there are 120 freshmen, 90 sophomores, 110 juniors, and 80 seniors. A school administrator selects a simple random sample of 12 of the freshmen, a simple random sample of 9 of the sophomores, a simple random sample of 11 of the juniors, and a simple random sample of 8 of the seniors. She then interviews all the students selected. Your answer: O Systematic random sampling o Convenience sampling Stratified sampling Cluster sampling

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