Marks secured by elevan students in two subjectsare given below :Subject ISubject II : 69 64 65 63 65 62 65 64 66 59 62Find the coefficient of correlation.: 71 68 66 67 70 71 70 73 72 65 66

Correlation: Correlation a measure which indicates the “go-togetherness” of two data sets. It can be…

Answered: Marks secured by elevan students in two…

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 coefficient of correlation for the following data by rank difference method: 75 88 95 70 60 80 81 50 Y 120 134 150 115 110 140 142 100
Find the coefficient correlation from the following data X 78 36 98 25 75 82 90 62 65 39 Y 84 51 91 60 68 62 86 58 53 47
Weight (lbs.) 173 184 194 214 168 220 188 188 207 167 217 Systolic Blood Pressure 132 143 153 162 154 168 137 149 159 128 1 1. The sample correlation coefficient is _____________
Calculate the coefficient of correlation for the ages of húsband and wife : Age of husband Age of wife 23 27 28 29 30 31 33 35 36 39 : 18 22 23 24 25 26 28 29 30 32
The correlation between midterm and final grades for 300 students is 0.620. If 5 points are added to each midterm grade, the new r will be: a. 0.124 b. 0.57 c. 0.62 d. 0.744
Jim and Larry run a soup stand. The data below represents the sales of soup that they had on 8 randomly selected days, along with the high temperature on that day. a) Create a scatter diagram for this data set and comment on whether there is a positive or negative relationship between these variables.b) Calculate the correlation coefficient between temperature and sales.c) Does a linear relationship exist between these variables? Explain to me why or why not this is the case.d) Using excel, calculate the least squares regression equation for this data set. e) Using your equation, predict the soup sales on a day where the temperature is 29 degrees.f) Interpret the slope of this equation.g) Can we use this data set and regression equation to predict the sales on a day when the average temperature is 102 degrees? Why or why not?h) What is the R-squared for this equation? How do you interpret that R-squared?
Managers rate employees according to job performance and attitude. The results for several randomly selected employees are given below. Does an employee’s attitude affect their job performance? Performance 59 63 65 69 58 77 76 69 70 64 Attitude 72 67 78 82 75 87 92 83 87 78 Calculate the correlation coefficient, r, and describe the relationship, if any, between the variables 11.659, positive linear 4.837, positive linear 0.863, positive linear 0.745, positive linear 0.0013, positive linear
3. The speed (in miles per hour) of 8 vehicles and their braking distance (in feet) when stopping on a dry surface speed, x braking distance, y 20 30 40 50 50 60 65 70 55 72 75 110 138 162 193 225 type of correlation: Conclusion
Use Spearman rho formula to determine if there is a correlation between the English and Math score of 10 students English 86 76 46 71 82 64 58 80 75 61 Math 66 80 40 60 65 56 58 77 67 81 Ho: Ha: Calculated Value: Tabulated Value: Decision: Conclusion:
Find correlation coefficient If xi 0 11 21 23 14 25 yi 5 43 45 47 51 54
Given the table below, use your calculator to find the Correlation Coefficient xx 7.1 9.6 8.9 4.5 2.9 4.4 yy 17.9 25 22.4 18.6 12.3 15.9
33 Calculate the coefficient of rank correlation from the following data:- X 60 34 40 50 41 22 43 42 66 64 46 Y 75 32 34 40 45 33 12 30 36 72 41 57 45

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Marks secured by elevan students in two subjects are given below : I : 71 68 66 67 70 71 69 64 65 63 65 62 65 70 73 72 65 66 Subject II Find the coefficient of correlation. 64 66 59 62