Business Statistics And Research Methods - Practice Test

[#151] Which of the following is an absolute measure of dispersion?

(A) Coefficient of variation

(B) Coefficient of dispersion

(C) Standard deviation

(D) Coefficient of skewness

Correct Answer

(C) Standard deviation

[#152] If both the regression coefficient of two series are negative, the coefficient of correlation should be

(A) Positive

(B) Negative

(C) Zero

(D) None of the these

Correct Answer

(B) Negative

[#153] Which one of the following statement is false regarding normal distribution?

(A) Mean, median and mode always coincide

(B) Within ±1.96σ limits from mean value, the area under the distribution is 99% of the total area

(C) The area under the normal curve represents probabilities for the normal random variable and the total area for the normal probability distribution is one

(D) For every pair of values of mean and standard deviation, the curve of the distribution is bell-shaped and symmetric

Correct Answer

(B) Within ±1.96σ limits from mean value, the area under the distribution is 99% of the total area

[#154] Geometric mean of 04 and 09 will be-

(A) 8

(B) 5

(C) 6

(D) 6.5

Correct Answer

(C) 6

[#155] Which of these must always be avoided for a technical report?

(A) Facts

(B) Tests

(C) Personal prejudices

(D) Experiments

Correct Answer

(C) Personal prejudices

Business Statistics And Research Methods - Study Mode

[#151] Which of the following is an absolute measure of dispersion?

Correct Answer

[#152] If both the regression coefficient of two series are negative, the coefficient of correlation should be

Correct Answer

[#153] Which one of the following statement is false regarding normal distribution?

Correct Answer

[#154] Geometric mean of 04 and 09 will be-

Correct Answer

[#155] Which of these must always be avoided for a technical report?

Correct Answer