DESCRIPTIVE STATISTICSComparing standard deviations without calculationThree distributions, labeled (a), (b), and (c) are represented below by their histograms. Each distribution is symmetrical and is mWithout performing any calculations, order their respective standard deviations o,, O, and o.(a)(Б)5.6 7.8 9 10 11 12 13 141.2 34 5 67 89 10 I1 12 13 142.14(c)田田a2.3 4 56.7 8 910 11 12 13 14口

Answered: Three distributions, labeled (a), (b),…

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)
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 342 people. x n 0 97 1 96 2 98 3 51 (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.
Are the snow conditions a factor in the number of visitors at a ski resort? The table below shows data that was collected. Machine Made Powder Hard Packed 1224 1733 1427 1976 1501 1542 1432 2493 1022 1080 1707 1350 1383 2410 2474 1033 2137 2051 1892 1710 2029 1022 1006 Assume that all distributions are normal, the three population standard deviations are all the same, and the data was collected independently and randomly. Use a level of significance of α=0.01α=0.01.H0: μ1=μ2=μ3H0: μ1=μ2=μ3H1:H1: At least two of the means differ from each other. The test-statistic for this data: F = The p-value for this sample =
Name C: Compute the mean & the standard deviation of the following slightly larger data set (again, with no rounding): (X₁-Xbar) (x₁ - Xbar)² i 1 2 3 4 5 7.2 7.1 7.1 6 7.2 7 7.1 8 7.2 9 7.1 10 7.2 11 7.2 12 7.2 Σ(x₁) = 861 N = Xbar = 775 error = X₁ 7.2 7.3 diff diff = Tex 6. Bood 16,00 44 forgova Nove 6103 or $3 Σ(x₁ - Xbar)² = N - 1 = σA = Percent Error & Percent Difference: Use your values from the C data set in part IV & a value for Xknown = 7.21 to compute the error, relative error, & %E. Write down your symbolic formulas in the space below each answer. Include +/- signs. D forory?" rel. GA=6,087 % rel. σA=FU 70 rel. error = on God A rel. error = rel. diff 404 0,06 rel. diff= x lab I fuc error = ₁x fre = 7.1 & X₂ 7.3, to compute the diff, rel. diff, & %D. Use two experimental values, Write down your symbolic formulas in the space below each answer. ylab-x the %E= = %E= %D= %D=
Are the snow conditions a factor in the number of visitors at a ski resort? The table below shows data that was collected. Hard Packed Machine Made Powder 2457 1401 1708 1484 1895 2193 2334 1849 2803 1816 1870 1842 1792 1873 2969 2219 989 1791 1504 1917 2143 1265 1881 1545 2341 1531 Assume that all distributions are normal, the three population standard deviations are all the same, and the data was collected independently and randomly. Use a level of significance of a = 0.05. Ho: µi = µ2 = µ3 H1: At least two of the means differ from each other. 1. For this study, we should use Select an answer v 2. The test-statistic for this data = (Please show your answer to 3 decimal places.) 3. The p-value for this sample = (Please show your answer to 4 decimal places.) 4. The p-value is Select an answer 5. Base on this, we should Select an answer v hypothesis 6. As such, the final conclusion is that... O There is insufficient evidence to support the claim that snow conditions is a factor in the…
The following table shows the distribution of scores on a final elementary statistics examination for a large section of students. 0.12 The cumulative relative frequency for the class 60-70 (i.e. what percentage of students scored 70 or lower) is 0.06 0.57 Classes for Exam Scores 90 and over 80-90 70 - 80 60-70 50 - 60 40 - 50 Under 40 0.43 Number of Students 5 12 40 18 13 6 6
The following table gives the math SAT scores for some recent selected years. Find the average, variance, and standard deviation of each. (Round your answers to four decimal places.) Males 500 502 498 504 497 Females 446 453 450 454 451 Males: mean variance standard deviation Females: mean variance standard deviation Which group is varying more? femalesmales cannot be determined

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