Find Karl Pearson's coefficient of correlation between sales and expenses of thefollowing ten firms :FirmSales ('000 units)Expenses ('000Dollars)23456789105050556065656560605011131416161515141313

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Answered: Find Karl Pearson's 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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Calculate the Karl Pearson's coefficient of correlation of the short-term ocillations for the indices of supply and price of certain commodity given here : Year Year Index of Index of Index of Price Index of Supply Supply Price 2003 91 117 2011 104 77 2004 98 97 2012 98 93 2005 95 102 2013 100 89 2006 92 108 2014 108 83 2007 93 105 2015 116 78 2008 96 96 2016 114 84 2009 102 77 2017 111 93 2010 107 68 [Take 5-yearly moving average and ignore decimals in computing the average.]
9. The Spearman rank-order correlation coefficient is used to quantify of the direction and strength of the relationship between two ________ variables. interval ratio nominal ordinal
Activity 3.2. INFORMATION FROM CONTIGENCY TABLES • A group of patients were classified in terms of their smoking habits and the incidence of hypertension. Table 3 shows the distribution of the patients along the two variables. Hypertension Smoking Habits With Without Non-smokers 6 Moderate smokers 15 10 Heavy smokers 9 6 • Copy and complete the crosstabulation.
3. .... 2. 5. 4. 3. 2. 参 dollars per year) Salary (thousands of Acreage dollars per year) Salary (thousands of square feet for the same houses, what would the correlation be? for some houses is 0.91. If you found the correlation between house price in thousands of dollars and area in 4.24 House Price The correlation between house price (in dollars) and area of the house (in square feet) Education (years) 2. 4. 0. 12 1. 8. 20. 60- Start Year 1985 40 2005 1995 2010 09 li. 06 (B) Full Bath 4. 1. 7. 6. 5. : (A) 0.777 0.374
Assuming the following table of the cost (X) and selling (Y) price of flight tickets in dollars ($): Cost Price (X) Sell Price (Y) 200 300 230 250 500 510 540 700 670 730 320 500 190 412 280 355 625 635 Compute the following: 1. Plot a scatter plot of the data (manual plot or use any software like excel). (2 marks) 2. Pearson correlation coefficient (r). 3. The relation type and strength. 4. Linear regression formula (9, = Bo +B,X,). 5. The estimated of the ticket selling price when the cost is $500. 6. The error of the ticket selling price estimate when the cost is $500. 7. What is the percent of cost price variable interpret the variation of sell price variable (How much the coefficient of determination)? (2 marks) (Imark) (2 marks) (I mark) (I mark) (I mark)
1. The figures in the following table give the number of criminal convictions and the number unemployed (in millions) for the years 1924-33. Find the coefficient of rank correlation.

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Find Karl Pearson's coefficient of correlation between sales and expenses of the föllowing ten firms : Firm 1 2 3 4 5 6 7 8 10 Sales ('000 units) Expenses ('000Dollars) 50 50 55 60 65 65 65 60 60 50 11 13 14 16 16 15 15 14 13 13