Statistics & Research Methods (CBSE-NET (UGC) Psychology (Paper-II & Paper-III)): Questions 153 - 155 of 161

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Question number: 153

» Statistics & Research Methods » Inferential Statistics

MCQ▾

Question

The formula to compute correlation coefficient (r) is ________.

Choices

Choice (4) Response

a.

r=i=1n(XiX¯)(YiY¯)(n1)XiYi

b.

r=i=20n(XiX¯)(YiY¯)(n5)XiYi

c.

r=i=1n(YiX¯)(YiY¯)(n1)XiYi

d.

r=i=1n(XiX¯)(XiY¯)(n1)XiXi

Passage

Read the following paragraph and answer the five questions which follow:

Industrial psychologist wanted to study the job efficiency of the company executives in relation to MBA marks, selection test scores, evaluation score at the end of inhouse training. Job efficiency correlated with MBA marks (r = 0.40), selection test scores (r = 0.50) and the evaluation scores at the end of inhouse training (r = 0.60). All the three correlation were statistically significant. The multiple regression was computed using job efficiency as the criterion and the other three variables as the predictors. The three Predictors explained 56.25 percent of variance in the job efficiency. The industrial psychologist further thought that the communication skills assessment would enhance the predictability of-job efficiency. As such the communication skills of the respondents were also assessed, which correlated with job efficiency by 0.35, again a statistically significant value. However when communication skills were added as the fourth predictor in the multiple regression, the change in R2 (squared multiple correlation) was found to be insignificant. (Paper - 3 July)

Question number: 154 (1 of 5 Based on Passage) Show Passage

» Statistics & Research Methods » Measures of Variation

Appeared in Year: 2016

MCQ▾

Question

What would be the multiple correlation between the job efficiency and the three predictors (MBA marks, selection test scores, and the evaluation scores at the end of inhouse training)?

Choices

Choice (4) Response

a.

Inadequate data

b.

0.65

c.

0.5

d.

0.75

Question number: 155 (2 of 5 Based on Passage) Show Passage

» Statistics & Research Methods » Inferential Statistics

Appeared in Year: 2016

MCQ▾

Question

Which one of the following conclusion can be drawn on the basis of above paragraph?

Choices

Choice (4) Response

a.

The four predictors theoretically appear to be correlated, but we cannot infer about their intercorrelations from the data provided.

b.

Out of the four predictors, at least some are correlated with each other.

c.

All the four predictors (MBA marks, selection test scores, evaluation score at the end of inhouse training and communication skills) are uncorrelated with each other.

d.

Communication skills scores are uncorrelated with other predictors.

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