Calculate coefficient of correlation between marks in Mathematics and marks in Economics obtained by 10 students.

Calculate coeffcient of correlation between marks in Mathematics and marks in Economics obtained by 10 students.

The coefficients of rank correlation between marks in Mathematics and marks in Physics obtained by a certain group of students is 0.8. If the sum of the squars of the difference in the rank is given to be 33, then find the number of students in the group.

Calculate Karl Pearson's coefficient of correlations between the marks in Geography and History obtained by 8 students

Calculate Spearman's rank correlation coefficient between the marks in Mathematics and Accountancy by 9 students.

Find the Karl Pearson's coefficeint of correlation between the marks in English and Mathematics by ten students.

The line of regression marks in economics (X) for marks in mathematics (Y) for a class of 50 students is 3y - 5x+180 = 0. Average score in mathematics is 44 and variance of marks in economics is 9/16th , of variance of marks in mathematics. Find the average score in economics and also the coefficient of correlation between marks in economics and mathematics.

The following table shown the mean and standard deviation of the marks of Mathematics and Physics scored by the students in a school : The correlation coefficient between the given marks is 0.86 . Estimate the likely marks in Physics if the marks in Mathematics are 92 .