Business Statistics And Research Methods - Study Mode

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[#536] Which of the following statement/s is/are true in context of ANOVA? 1. ANOVA is an acronym for "analysis of variance" 2. ANOVA is a parametric statistical hypothesis test to determine whether the means from two or more samples of data come from the same distribution or not. 3. ANOVA is used when one variable is numeric and one is categorical, such as numerical input variables and a classification target variable in a classification task. 4. ANOVA is a class of statistical tests that calculate the ratio between variances values, such as the variance from two different samples. 5. ANOVA tell us the explained and unexplained variance by a statistical test.

(A) 1, 2 and 3

(B) 2, 3 and 5

(C) 1, 2, 3 and 4

(D) all of the above

Correct Answer

(D) all of the above

[#537] Which one of the following methods seemsto be most appropriate in qualitative sampling?

(A) Random digit dialling

(B) Quota

(C) Stratified random

(D) Simple random

Correct Answer

(B) Quota

[#538] Object of median is to

(A) Fix a representative value

(B) Establish a dividing line separating the higher from the lower values

(C) Both A and B

(D) Neither A nor B

Correct Answer

(C) Both A and B

[#539] Identify from the following, the test statistic for which the value of numerator should always be greater than that of denominator.

(A) 'Chi-square' value

(B) 'F' value

(C) 'Z' value

(D) 't' value

Correct Answer

(B) 'F' value

[#540] If the value of co-efficient of determination is 0.64, what is the value of co-efficient of correlation?

(A) 0.40

(B) 0.80

(C) 0.08

(D) 0.04

Correct Answer

(B) 0.80