Business Statistics And Research Methods - Practice Test

[#896] Which of the following is not a restricted random sampling technique?

(A) Stratified sampling

(B) Simple random sampling

(C) Systematic sampling

(D) Multi-stage sampling

(E) Startified sampling

(F) Simple random sampling

(G) Systematic sampling

(H) Multi-stage sampling

Correct Answer

(B) Simple random sampling
(F) Simple random sampling

[#897] If 'p', 'g' and 'n' are probability of success, failure and number of trials respectively in a Binomial Distribution, what is its Standard Deviation?

(A) $$sqrt {np} $$

(B) $$sqrt {pq} $$

(C) $${left( {np} ight)^2}$$

(D) $$sqrt {npq} $$

Correct Answer

(D) $$sqrt {npq} $$

[#898] Arrange the following steps in sequence in constructing a frequency distribution. 1. The classes should be clearly defined and each observations should be included in only one of class interval. 2. Check that the number of classes should neither be too large nor too small. 3. Check that all class intervals are of same width. 4. List the value of the variable in different class interval. Select the correct answer using the options given below

(A) 1, 3, 2, 4

(B) 1, 2, 3, 4

(C) 1, 4, 3, 2

(D) 2, 1, 3, 4

Correct Answer

(A) 1, 3, 2, 4

[#899] In calculating the regression equation linking two variables, the standard formulae for the regression coefficients are given in terms of X and Y. Which of the following is true?

(A) X must be the variable which will be forecast

(B) It does not matter which variable is which

(C) Y must be the dependent variable

(D) Y must be the variable shown on the vertical axis of a scatter graph

Correct Answer

(C) Y must be the dependent variable

[#900] In a questionnaire, how many answers should be there for simple alternative questions?

(A) Three

(B) Two

(C) No

(D) Many

Correct Answer

(B) Two

Business Statistics And Research Methods - Study Mode

[#896] Which of the following is not a restricted random sampling technique?

Correct Answer

[#897] If 'p', 'g' and 'n' are probability of success, failure and number of trials respectively in a Binomial Distribution, what is its Standard Deviation?

Correct Answer

Correct Answer

[#899] In calculating the regression equation linking two variables, the standard formulae for the regression coefficients are given in terms of X and Y. Which of the following is true?

Correct Answer

[#900] In a questionnaire, how many answers should be there for simple alternative questions?

Correct Answer