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The coefficient of rank correlation of the marks obtained by 10 students in statistics and accountancy was found to be 0.8. It was later discovered that the difference in ranks in the two subjects obtained by one of the students was wrongly taken as 7 instead of 9. Find the correct coefficient of rank correlation.

The coefficient of rank correlation of the marks obtained by 10 students in statistics and accountancy was found to be 0.8. It was later discovered that the difference in ranks in the two subjects obtained by one of the students was wrongly taken as 7 instead of 9. Find the correct coefficient of rank correlation.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter4: Equations Of Linear Functions
Section4.5: Correlation And Causation
Problem 11PPS
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The coefficient of rank correlation of the marks obtained by 10 students in statistics and accountancy was found to be 0.8. It was later discovered that the difference in ranks in the two subjects obtained by one of the students was wrongly taken as 7 instead of 9. Find the correct coefficient of rank correlation. Ques.5 From the following data, compute the rank correlation. X 82 68 75 61 68 73 85 68 Y 81 71 71 68 62 69 80 70 Ques.6 Difference between Correlation and Regression. Ques.7 Find the two regression equation of X on Y and Y on X from the following data: X : 10 12 16 11 15 14 20 22 Y: 15 18 28 23 14 20 17 25 Ques.8 After investigation it has been found the demand for automobiles in a city depends mainly, if not entirely, upon the number of families residing in that city. Below are the given figures for the sales of automobiles in the five cities for the year 2019 and the number of families residing in those cities. City No. of Families (in lakhs): X Sale of automobiles (in '000): Y 70 25.2 Belagavi Bangalore 75 28.6 Hubli 80 30.2 Kalaburagi 60 22.3 Mangalore 90 35.4 Fit a linear regression equation of Y on X by the least square method and estimate the sales for the year 2020 for the city Belagavi which is estimated to have 100 lakh families assuming that the same relationship holds true.
Transcribed Image Text:The coefficient of rank correlation of the marks obtained by 10 students in statistics and accountancy was found to be 0.8. It was later discovered that the difference in ranks in the two subjects obtained by one of the students was wrongly taken as 7 instead of 9. Find the correct coefficient of rank correlation. Ques.5 From the following data, compute the rank correlation. X 82 68 75 61 68 73 85 68 Y 81 71 71 68 62 69 80 70 Ques.6 Difference between Correlation and Regression. Ques.7 Find the two regression equation of X on Y and Y on X from the following data: X : 10 12 16 11 15 14 20 22 Y: 15 18 28 23 14 20 17 25 Ques.8 After investigation it has been found the demand for automobiles in a city depends mainly, if not entirely, upon the number of families residing in that city. Below are the given figures for the sales of automobiles in the five cities for the year 2019 and the number of families residing in those cities. City No. of Families (in lakhs): X Sale of automobiles (in '000): Y 70 25.2 Belagavi Bangalore 75 28.6 Hubli 80 30.2 Kalaburagi 60 22.3 Mangalore 90 35.4 Fit a linear regression equation of Y on X by the least square method and estimate the sales for the year 2020 for the city Belagavi which is estimated to have 100 lakh families assuming that the same relationship holds true.
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