34Calculate the coefficient of correlation from the following data by theSpearman's Rank Difference method:Prices ofPrices ofPrices ofPrices ofTea (Rs.)Coffee (Rs.)Tea (Rs.)Coffee (Rs.)1206011075134801408895150811427011550100

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Answered: Calculate the coefficient of…

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 data gives the number of hours 10 students spent studying and their corresponding grades on their midterm exams. Hours Spent Studying 0 0.5 1.5 2 2.5 3 3.5 4 4.5 5.5 Midterm Grades 63 66 69 75 78 81 84 87 90 96 Estimate the correlation in words, positive, negative, no correlation. (a) Positive (b) Negative (c) No correlation
The table shows the money earned from selling ice cream at a Galveston restaurant as it relates to the high temperature for the day. Temperature 58 61 71 78 81 85 89 96 100 (Fahrenheit) Ice Cream Sales 210 240 515 609 796 800 950 994 900 (Dollars) What does the correlation coefficient for the data indicate about the strength of the linear association between the temperature and ice cream sales in Galveston? А Strong negative correlation Weak negative correlation C Strong positive correlation Weak positive correlation
Let x be the average number of employees in a group health insurance plan, and let y be the average administrative cost as a percentage of claims. x 3 7 15 32 75 y 40 35 30 26 18 (a) Make a scatter diagram of the data and visualize the line you think best fits the data. Flash Player version 10 or higher is required for this question. You can get Flash Player free from Adobe's website. (b) Would you say the correlation is low, moderate, or strong? positive or negative? strong and negative moderate and negative strong and positive low and negative low and positive moderate and positive (c) Use a calculator to verify that Σx = 132, Σx2 = 6932, Σy = 149, Σy2 = 4725, and Σxy = 2997. Compute r. (Round your answer to three decimal places.)r = As x increases, does the value of r imply that y should tend to increase or decrease? Explain. Given our value of r, we cannot draw any conclusions for the behavior of y as x increases. Given our value of r, y should tend to…
(c) What is rank correlation? How to rank data? Rank and find the rank correlation for the following data of English and Math marks. Math English (Marks) 56 (Marks) 66 75 70 45 40 71 60 61 65 64 56 58 59 80 77 76 67 61 63
Please help me answer the questions about correlation according to the graph. So would it be linear, strong, positive, or no association? Or negative and weak?
The age and prices of 11 Nissan cars given in the following data: Age (in years) 5 4 6 5 5 5 6 6 2 7 7 Price (in $100s) 85 103 70 82 89 98 66 95 169 70 48 a. Obtain the correlation coefficient between the age and price of the cars. Interpret the value of the correlation coefficient. b. Obtain a regression equation of Price (dependent variable) on Age (Independent variable). c. What will be the Price of the car after 3 years? d. Find the coefficient of determination. Determine the percent of variation that is explained by the regression equation clearly.
After gathering data about the number of starfish and measuring the pollution in areas of the ocean you find a negative linear correlation between pollution levels and number of starfish. What can you conclude based on this information? a. There is a confounding variable that is affecting both pollution and starfish. b. As pollution rises the number of starfish falls c. That pollution is causing starfish to die, leading to the negative correlation d. That pollution is supporting starfish, leading to the negative correlation
What is the value of the correlation coefficent, r? Is the strength of the linear relationship strong, moderately strong, somewhat weak or very weak?

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Calculate the coefficient of correlation from the following data by the Spearman's Rank Difference method: Prices of Prices of Prices of Prices of Coffee (Rs.) Tea (Rs.) Coffee (Rs.) Tea (Rs.) 120 60 110 75 134 80 140 88 150 81 142 95 70 115 50 100