Business Statistics And Research Methods - Study Mode

[#561] Regression coefficient of x on y will be:
Correct Answer

(D) $$rfrac{{sigma x}}{{sigma y}}$$

[#562] The formula to find the mid point of a class is
Correct Answer

(C) $$frac{{{L_1} + {L_2}}}{2}$$

[#563] How will the arithmetic mean be affected by adding a constant 'b' to every item?
Correct Answer

(A) $$overline X + b$$

[#564] When the population mean is either lower or higher than some hypothesised value . . . . . . . . Is considered to be appropriate.
Correct Answer

(A) one tailed test

[#565] If the Karl Pearson coefficient of correlation between x and y is 0.3, then the coefficient of correlation between -x and 2y is
Correct Answer

(C) 0.3