40Find out the variance of the following series:IncomeNo. of PersonsMore than1000900800700600500400300200100501102004006007008509001000***** * ::

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Answered: Find out the variance 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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The following table shows the number of people that have either 0, 1, 2 or 3 cars registered in their name, from a sample of 311 people. x n 0 93 1 91 2 60 3 67 (a) Find the mean number of cars owned for this sample. Give your answer to at least 2 decimal places. (b) Find the standard deviation of cars owned for this sample. Give your answer to at least 2 decimal places.
9
The graph illustrates the distribution of test scores taken by College Aigebra students. The maximum possible score on the test was 140, while the mean score was 76 and the standard deviation was 14. 34 48 62 76 90 104 Distribution of Test Scores What is the approximate percentage of students who scored between 76 and 90 on the test? What is the approximate percentage of students who scored higher than 104 on the test? What is the appraximate percentage of students who scored higher than 118 on the test? What is the approximate percentage of students who scored between 48 and 104 on the test?
There are dozens of personality tests available on the World Wide Web. One test, scored on a scale of O to 200, is designed to give an indication of how "personable" the test taker is, with higher scores indicating more "personability. Suppose that scores on this test have a mean of 107 and a standard deviation of 20. Complete the following statements about the distribution of scores an this personality test. (a) According to Chebyshev's theorem, at least 36% of the scores lie between and . (Round your answer to the nearest whole number.) (b) According to Chebyshev's theorem, at least of the scores lie between 67 and 147.
Suppose the following data show the introductory interest rates on a sample of 5 credit cards: 6, 2.7, 3.3, 5.6, 3.7. Calculate the standard deviation of the sample. Note: the numbers may be different from the last problem. (please express your answer using 2 decimal places)
16. Find the m.g.f of standard normal variate.
The following graph, showing the distribution of the heights of 8585 men, is an approximation to a nearly normal distribution. The mean is approximately 68 inches and the standard deviation is approximately 3 inches. 1500 1200 900- 600 300 56 58 60 62 64 66 68 70 72 74 76 78 80 1) How many of these men are between 5'5" and 5'11" tall ? (that is one standard deviation of the mean) 2) How many men are between 5'2" and 6'2" tall ? (2 st. dev.) 3) How many men are less than 5'2" tall ? 4) What percent of the men are taller than 71 inches?
A weight-loss clinic advertised that last month its patients, on average, lost 6 lb. Assuming that average refers to the mean, which of the following claims must be true based on this information? Note: More than one statement could be true. If none of the statements is true, mark the appropriate box. Last month, the number of their clients who lost 6 lb or more was equal to the number of their clients who lost 6 lb or less. Last month at least one of their patients lost exactly 6 lb. Last month at least one of their patients lost less than 10 lb. Two months ago some of their patients lost at least 6 lb. Last month all of their patients lost 6 lb or more. None of the above statements are true. X Ś A 181 Aa ?
52. Multiple Choice If the calorie contents of robin eggs are normally distributed with a mean of 25 and a standard devia- tion of 1.2, then approximately 95% of all robin eggs should In have a calorie content in the interval ex (A) [21.4, 28.6]. (B) [22, 28]. (C) [22.6, 27.4]. (D) [23, 27]. (E) [23.8, 26.2].
How do I solve the problem in the picture?
Business Weekly conducted a survey of graduates from 30 top MBA programs. On the basis of the survey, assume the mean annual salary for graduates 10 years after graduation is 190000 dollars. Assume the standard deviation is 36000 dollars. Suppose you take a simple random sample of 73 graduates.Find the probability that a single randomly selected policy has a mean value between 186207.9 and 187471.9 dollars.P(186207.9 < X < 187471.9) = (Enter your answers as numbers accurate to 4 decimal places.)Find the probability that a random sample of size n=73n=73 has a mean value between 186207.9 and 187471.9 dollars.P(186207.9 < M < 187471.9) = (Enter your answers as numbers accurate to 4 decimal places.)
Which of the following is TRUE about z-scores? The data will always include an observation with a z-score of 0 If the data comes from a distribution with only positive values, there cannot be any negative z-scores The higher the z-score, the closer the data value is to the mean If the distribution is symmetric, then data values with z-scores of -5 and +5 are equally far away from the mean

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Find out the variance of the following series : Income No. of Persons More than 1000 900 800 700 600 500 400 300 200 100 0. 50 110 200 400 600 700 850 900 1000 **** * ::