You may need to use the appropriate appendix table or technology to answer this question.Consider the following hypothesis test.Ho: u = 20µ # 20Ha:The population standard deviation is 12. Use a = 0.05. How large a sample should be taken if the researcher is willing to accept a 0.05 probability of making a type II error when the actual population mean is 23?(Round your answer up to the nearest integer.)

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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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You may need to use the appropriate appendix table or technology to answer this question. Money reports that the average annual cost of the first year of owning and caring for a large dog in 2017 is $1,448. The Irish Red and White Setter Association of America has requested a study to estimate the annual first-year cost for owners of this breed. A sample of 50 will be used. Based on past studies, the population standard deviation is assumed known with o = $245. 1,902 2,042 1,936 1,817 1,504 1,572 1,532 1,907 1,882 2,153 1,945 1,335 2,006 1,516 1,839 1,739 1,456 1,958 1,934 2,094 1,739 1,434 1,667 1,679 1,736 1,670 1,770 2,052 1,379 1,939 1,854 1,913 2,163 1,737 1,888 1,737 2,230 2,131 1,813 2,118 1,978 2,166 1,482 1,700 1,679 2,060 1,683 1,850 2,232 2,294 (a) What is the margin of error for a 95% confidence interval of the mean cost in dollars of the first year of owning and caring for this breed? (Round your answer to nearest cent.) (b) The DATAfile Setters contains data collected…
You have created a pill that you think increases the temperature of a human. You read that the average temperature of a human is 98.6 degrees. You collected 40 people and gave them your pill and recorded their temperatures. You found that the sample mean was 99.1 degrees and the standard deviation was .5 degrees. Run the test using alpha = .05 Part A: Give appropriate Ho and H1. Part B: Run the test. Part C: If your test showed that your pill worked, then by how many degrees? If not, then by how many degrees???
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Consider the data from the Anthropology 105 class. The mean for women is 64.33 in and the standard deviation is 2.64 in. The average height of men in the US is approximately 5ft 10in. What proportion of women represented here are shorter than the average man?
You may need to use the appropriate appendix table or technology to answer this question. IQ scores (as measured by the Stanford-Binet intelligence test) in a certain country are normally distributed with a mean of 95 and a standard deviation of 11. Find the approximate number of people in the country (assuming a total population of 323,000,000) with an IQ higher than 122. (Round your answer to the nearest hundred thousand.)
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You may need to use the appropriate appendix table to answer this question. A person must score in the upper 2% of the population on an admissions test to qualify for membership in society catering to highly intelligent individuals. If test scores are normally distributed with a mean of 130 and a standard deviation of 5, what is the minimum score a person must have to qualify for the society? (Round your answer to the nearest integer.)
You may need to use the appropriate appendix table or technology to answer this question. After deducting grants based on need, the average cost to attend the University of Southern California (USC) is $27,175. Assume the population standard deviation is $7,400. Suppose that a random sample of 56 USC students will be taken from this population. (a) What is the value of the standard error of the mean? (Round your answer to the nearest whole number.) $ 0.82298 x (b) What is the probability that the sample mean will be more than $27,175? 0.5 (c) What is the probability that the sample mean will be within $1,000 of the population mean? (Round your answer to four decimal places.) 0.6826 x (d) What is the probability that the sample mean will be within $1,000 of the population mean if the sample size were increased to 100? (Round your answer to four decimal places.) 0.8234

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