Statistics & Research Methods (CBSE-NET (UGC) Psychology (Paper-II & Paper-III)): Questions 119 - 124 of 165

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Question number: 119

» Statistics & Research Methods » Measures of Central Tendency

MCQ▾

Question

________ is found by arranging scores from the highest to the lowest and selecting the score that falls in the middle.

Choices

Choice (4) Response

a.

Average

b.

Median

c.

Mean

d.

Mode

Question number: 120

» Statistics & Research Methods » Measures of Variation

MCQ▾

Question

The most widely used measure of correlation is

Choices

Choice (4) Response

a.

the Pearson r.

b.

Spearman’s rho.

c.

the rank-difference correlation coefficient.

d.

the Spearman-Brown prophecy formula.

Passage

A psychologist wanted to develop a numerical ability test for the student population. She wrote eighty multiple choice items, each item with five alternatives. The item analysis was carried out by finding discrimination index and item-remainder correlation for each item. Sixty items were retained in item analysis.

The new version, with finally retained sixty items was administered to a new sample (N = 400) twice with a time gap of eight weeks. The test-retest correlation was found to be 0.22, significant at. 01 level. The data obtained at the first administration of the sixty item version was also used for computing split-half reliability. The correlation between scores based on odd items and the scores based on even items was found to be 0.60. The split-half reliability coefficient was obtained after applying Spearman-Brown correction.

The scores obtained by the students were correlated with their marks in Mathematics in their annual examination which took place three months after the data collection. The product-moment correlation of 0.6 was obtained between test scores and mathematics. Norms were developed for the test. The normative sample yielded a mean of 40 and standard deviation of 8. The data were found to be normally distributed. As norms, percentile ranks were obtained.

(June 2014)

Question number: 121 (1 of 1 Based on Passage) Show Passage

» Statistics & Research Methods » Measures of Variation

MCQ▾

Question

Which of the following correlation is suitable while computing item-remainder correlation in the above analysis?

Choices

Choice (4) Response

a.

Spearman rank difference correlation

b.

Phi-coefficient

c.

Multiple correlation

d.

Point-biserial correlation

Question number: 122

» Statistics & Research Methods » Inferential Statistics

MCQ▾

Question

Identical twins are likely to have almost identical IQs. In contrast, parents and their children have IQs that are only generally similar. The correlation between IQs of parents and children is. 35; that between identical twins is ________.

Choices

Choice (4) Response

a.

0.35

b.

0.70

c.

0.85

d.

0.86

Question number: 123

» Statistics & Research Methods » Application of Statistics in Psychology

MCQ▾

Question

Statistics can be classified as ________.

Choices

Choice (4) Response

a.

Descriptive

b.

A and B

c.

Inferential

d.

Hypothetical

Question number: 124

» Statistics & Research Methods » Inferential Statistics

MCQ▾

Question

The ________ statistics is used for decision making for generalizing from small samples, and for drawing conclusions.

Choices

Choice (4) Response

a.

Parametric

b.

Descriptive

c.

Inferential

d.

Question does not provide sufficient data or is vague

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