Which of the following statements is notcorrect?А.If the population mean and populationstandard deviation are both known, one canuse the central limit theorem and makeprobability statements about the means ofsamples taken fromthe populationВ.If the population mean and populationstandard deviation are both known, one canmake probability statements about individual xvalues taken from the populationС.When an interval estimate is associated with adegree of confidence that it actually includesthe population parameter of interest, it isreferred to as a confidence intervalD.When sample data are used for estimating apopulation mean, sampling error will not bepresent since the observed sample statistic willnot differ from the actual value of thepopulation A point estimator is defined as:A.a single value that is the best estimate of anunknown population parameterВ.the average of the population valuesС.a single value that is the best estimate of anunknownsample statisticD.a number which can be used to estimate apoint in timewhich is unknown

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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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Suppose that a college determines the following distribution for X=number of courses taken by a full-time student this semester: Value of X: 3 4 5 6 Probability 0.05. 0.25 0.27 a) The probability for X=4 is missing, What is it? b) What is the average number of courses full-time students at this college take this semester? c) What is the standard deviation of the number of courses full-time students at this college take this semester. d) What is P(X>4.7)
please answer the question in the attached picture with work shown, thanks! #1
A final exam in Reindeer Research Studies has a mean of 62 and a standard deviation of 5. If 25 students are randomly selected, find the probability that the mean of their test Scores less than 62. P(x < 62) = P(z < %3D
B.202 ul X с Too Weekly w sal Success C X Bb Exam 2 X Bb Take Test: Bb UTF-8 Ass Question Completion Status: nccu.blackboard.com/webapps/assessment/take/launch.jsp?course_assessment_id=_26 http: QUESTION 8 For any continuous random variable, the probability that the random variable takes a value less than zero a. is any number between zero and one. b. is more than one, since it is continuous. c. is a value larger than zero. d. is zero. QUESTION 9 For the standard normal probability distribution, the area to the right of the mean is a. 1. b. 3.09.
Suppose that all the students registered to the probability and statistics course have to buy textbook. The 28 % of all students demand a new book, on the other hand the other 72 % want a used text book. Consider randomly selecting 40 purchasers.a. What are the mean value and standard deviation of the number who want a new copy of thebook?b. What is the probability that the number who want brand-new books is more than 1.5σ awayfrom the mean value?c. The bookstore has 30 new and 30 used textbooks in stock. If 40 people come in one by one topurchase this text, what is the probability that all 40 will get the type of book they want fromcurrent stock? [Hint: Let X = the number who want a new copy. For what values of X will all 40get what they want?]
About 14% of unemployed adults in the adults in the united states held multiple jobs. A random sample of 67employed adults is chosen. Use the TI-84 plus calculator as needed a... is it appropriate to use the normal approximation to find the probabilty that less than 8.1% of the individual in the sample hold multiple jobs?if so find the probability .if not explain why notit is or is not appropriate to use the normal curve , since np=? < or > 10b..... Anew sample of 186 employed adults is chosen. find the probabilty that less than 8.1% of the individual in the sample hold multiple jobs. round the answer to least four decimal place needed. The probability that less than 8.1% of the individuals in this sample hold multiple jobs is ?c... Find the probabilty that more than 7.6%of the individual snin the sample of 186 hold multiple jobs. Round the answer to iat least four decimal places as needed. the probability that more than 7.6%of individual in the sample of 186 hold…
eTextbook and Media Attempts: 1 of 5 used Chapter 06, Section 6.2, Intelligent Tutoring Problem 023 Now, if the mean is 27 and the standard deviation is 6, find the probability that x assumes a value between 29.5 and 57.0. Round your answer to four decimal places. The probability = i eTextbook and Media Save for Later Attempts: 0 of 5 used Submit Answer Type here to search 立

A sample of size 86 will be drawn from a population with mean 90 and standard deviation 24. Use the TI-83 Plus/TI-84 Plus calculator. Part: 0 / 2 Part 1 of 2 (a) Find the probability that x will be between 89 and 91. Round the answer to at least four decimal places. The probability that x will be between 89 and 91 is X
Scores for a common standardized college aptitude test are normally distributed with a mean of 489 and a standard deviation of 111. Randomly selected men are given a Test Preparation Course before taking this test. Assume, for sake of argument, that the preparation course has no effect.If 1 of the men is randomly selected, find the probability that his score is at least 566.P(X > 566) = Enter your answer as a number accurate to 4 decimal places.If 6 of the men are randomly selected, find the probability that their mean score is at least 566.P(M > 566) = Enter your answer as a number accurate to 4 decimal places.Assume that any probability less than 5% is sufficient evidence to conclude that the preparation course does help men do better. If the random sample of 6 men does result in a mean score of 566, is there strong evidence to support the claim that the course is actually effective? Yes. The probability indicates that is is (highly ?) unlikely that by chance, a randomly…
A sample of size 190 will be drawn from a population with mean 45 and standard deviation 11. Use the TI-83 Plus/TI-84 Plus calculator. Part: 0 / 2 Part 1 of 2 (a) Find the probability that x will be less than 43. Round the answer to at least four decimal places. The probability that x will be less than 43 is X
A statistician wishing to test a hypothesis that students score at most 75% on the final exam in an introductory statistics course decides to randomly select 20 students in the class and have them take the exam early. The average score of the 20 students on the exam is 72% and the standard deviation in the population is known to be = 15%. The statistician calculates the test statistic to be –0.8944. If the statistician chose to do a two-sided alternative, the P-value would be calculated by: a. finding the area to the right of –0.8944 and doubling it. b. finding the area to the left of –0.8944 and doubling it. c. finding the area to the right of the absolute value of –0.8944 and dividing it by two. d. finding the area to the left of –0.8944
Scores for a common standardized college aptitude test are normally distributed with a mean of 480 and a standard deviation of 114. Randomly selected men are given a Test Preparation Course before taking this test. Assume, for sake of argument, that the preparation course has no effect. If 1 of the men is randomly selected, find the probability that his score is at least 521.2. P(X > 521.2) = Enter your answer as a number accurate to 4 decimal places. If 15 of the men are randomly selected, find the probability that their mean score is at least 521.2. P(M > 521.2) = Enter your answer as a number accurate to 4 decimal places. Assume that any probability less than 5% is sufficient evidence to conclude that the preparation course does help men do better. If the random sample of 15 men does result in a mean score of 521.2, is there strong evidence to support the claim that the course is actually effective? No. The probability indicates that it is too possible by chance alone to…

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