A statistics professor claims that the average score on the Final Exam was 90. A group of students believesthat the average grade was lower than that. They wish to test the professor's claim at the a = 0.10 level ofsignificance. (Round your results to three decimal places)Which would be correct hypotheses for this test?Ο Ho: μ < 90, H1 : μ = 90O Ho:90, H₁:μ / 90Ο Ηo : μ = 90, Η: μ > 90O Ho:90, H₁:μ = 90O Ho: = 90, H₁:μ< 90A random sample of statistics students had the Final Exam scores shown below. Assuming that the testscores are normally distributed, use this sample to find the test statistic:Final Exam scores74 102 55 9258 92 989384 97 76 69675970 52test statistic:Give the P-value:Which is the correct result:O Do not Reject the Null HypothesisO Reject the Null HypothesisWhich would be the appropriate conclusion?There is not significant evidence to suggest that the average Final Exam score was less than 90There is significant evidence to suggest that the average Final exam score was less than 90

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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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a) An impact test is performed on 32 specimens of PVC pipe. Calculate the margin of error in estimating the true mean impact strength,1 if the population standard deviation is 0:31. Use a 95% condence level. b) Suppose you need to construct a condence interval. How do you decide whether to use a z-score or a t-score?
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a) Three confidence intervals were constructed using the same sample. Place these intervals in order from lowestconfidence to highest confidence: (17, 23) (14, 26) (18, 22)b) What was the sample mean of the data used to construct the intervals in part a?
What is wrong. In each of the following situations, identify what is wrong and then either explain why it is wrong or change the wording to make the statement true. b) The standard error of the sample mean is s^2/n c) A researcher wants to test H0: X with line on top = 30 versus the one - sided alternative Ha: X withb line on top < 30
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Determine whether the given value is a statistic or a parameter. 1) A sample of 120 employees of a company is selected, and the average age is found to be 37 years. A) Statistic 1) B) Parameter 2) After taking the first exam, 15 of the students dropped the class. A) Statistic 2) B) Parameter 3) After inspecting all of 55,000 kg of meat stored at the Wurst Sausage Company, it was found that 45,000 kg of the meat was spoiled. A) Parameter 3) B) Statistic 4) A health and fitness club surveys 40 randomly selected members and found that the average weight of those questioned is 157 lb. A) Parameter B) Statistic
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p = proportion of graduates who get a jobA published article indicates that only 1 in 3 university graduates have a job waiting for them. In an investigation of 200 recent graduates of university A, it was found that 51 had a job. Can it be concluded, with a level of significance of 0.01, that from this university the proportion of graduates who have a job is lower? Choose 1. the correct conclusion2. the correct interpretationSelect one: a) 1. H0 is rejected2. It can be ensured, with 99% confidence, that less than a third of the graduates of said university get a job. b) 1. H0 is not rejected2. It can be ensured, with 99% confidence, that less than a third of the graduates of said university get a job. c) 1. H0 is not rejected2. There is not enough evidence to consider, with 99% confidence, that less than a third of the graduates of said university get a job. d) 1. H0 is rejected2. There is not enough evidence to consider, with 99% confidence, that less than a third of the graduates of…

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