Business Statistics And Research Methods - Practice Test

[#271] Which of the following statements are true? 1. The coefficient of rank correlation has the same limits as the Karl Pearson's coefficient of correlation. 2. The coefficient of correlation is independent of the change of origin but not of scale. 3. The covariance between $$X$$ and $$Y$$ is defined as $$frac{{sum {xy} }}{n}$$ where, $$x = left( {X - overline X }
ight),y = left( {Y - overline Y }
ight)$$ xa0 xa0xa0 and $$n = $$ no. of paired observations. 4. $${b_{xy}}$$ is called regression coefficient of $$X$$ variable on $$Y$$ variable. 5. If $${b_{xy}}$$ is 0.4 and $${b_{yx}}$$ is 1.6, coefficient of determination would be 0.8. Select the correct answer:

(A) 1, 2 and 3

(B) 1, 3 and 4

(C) 3, 4 and 5

(D) 2, 3 and 5

Correct Answer

(B) 1, 3 and 4

[#272] If the dependent variable increases as the independent variable increases in an estimation equation, the coefficient of correlation will be in the range

(A) 0 to - 1

(B) 0 to - 0

(C) 0 to - 0.05

(D) 0 to 1

Correct Answer

(D) 0 to 1

[#273] If the two regression coefficients are 0.8 and 0.2, then the value of coefficient of correlation is

(A) + 0.16

(B) - 0.40

(C) - 0.16

(D) + 0.40

Correct Answer

(D) + 0.40

[#274] Which one of the following objectives is not the objective of secondary data collection?

(A) Identify the problem

(B) Test the hypothesis of the relevant present problem

(C) Better define the problem

(D) Interpret primary data more insightfully

(E) Identity the problem

(F) Test the hypotheses of the relevant present problem

(G) Better define the problem

(H) Interpret primary data more insightfully

Correct Answer

(D) Interpret primary data more insightfully
(F) Test the hypotheses of the relevant present problem

[#275] Cricketer 'A' scores on an average 40 runs with a standard deviation of 5. Scores of players 'B' and 'C', on an average, are 75 and 90 with standard deviations 10 and 18 respectively. Arrange the players in the descending order of consistency.

(A) A, B and C

(B) C, B and A

(C) B, A and C

(D) C, A and B

Correct Answer

(A) A, B and C

Business Statistics And Research Methods - Study Mode

Correct Answer

[#272] If the dependent variable increases as the independent variable increases in an estimation equation, the coefficient of correlation will be in the range

Correct Answer

[#273] If the two regression coefficients are 0.8 and 0.2, then the value of coefficient of correlation is

Correct Answer

[#274] Which one of the following objectives is not the objective of secondary data collection?

Correct Answer

[#275] Cricketer 'A' scores on an average 40 runs with a standard deviation of 5. Scores of players 'B' and 'C', on an average, are 75 and 90 with standard deviations 10 and 18 respectively. Arrange the players in the descending order of consistency.

Correct Answer