Question

The following data relates to marks obtained by 250 students in accountancy and statistics is 0.8. (i) Esitimate the marks obtained by a student in statistics in II PUC. Examination

Subject	Arithmetic mean	Variance
Accountancy (x)	48	16
Statistics (y)	55	25

Co-efficient of correlation between mavasin accountancy and statistics is 0.8 

1. Estimate the marks obtained by a student instatistics who secured 50 marks in accountancy and 

2. Estimate the marks obtained in accountancy when marks in statistics is 65.

Answer 1

1. Estimation y when x = 50 regression equation of yon x : (y – ȳ) = b_xy (x – x̄)

2. Estimation g x when y = 65, use regression equation g x on y :