Which of the following statements about the linear least squares model is FALSE? a) The population correlation R can measure both the direction and the strength of the linear association between two quantitative variables. b) When we construct the confidence interval for the population slope B. we should always check if our sample is random c) The point (X.) must lie on the regression line, where x is the sample mean of the explanatory variable and V is the sample mean of the response variable. d) If all points fall exactly on a straight line, then the sample correlation r must be 1.

Aline on the wall and a line on the floor are skew. always, sometimes, or never?

Solve for x and select the correct answer

The correlation coefficient between the number of students and marks obtained in end semester exam. (13 marks) give the statistical meaning of the relationship between the number of students and marks b. obtained in end semester exam. (3 marks) draw the number of students and marks obtained in end semester exam scatter diagram c. (4 marks) check list write your name and id corectly write the question number properly use your own calculator. show all the steps to solve the problems. use the correct formula. answer in provided time. don't use your mobile for any purpose. write your answer up to two decimal places