# Statistics & Research Methods-Inferential Statistics (NTA-NET (Based on NTA-UGC) Psychology (Paper-II)): Questions 61 - 65 of 72

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## Passage

A psychometrician wanted to develop a new test of Abstract Thinking. He prepared eighty items, presumably assessing abstract thinking. Each item had five alternatives answers, one of them being correct. The psychometrician carried out item analysis by using item-remainder correlations. Item analysis retained sixty items. To examine internal consistency among the items, inter-item correlations were inspected. Then the split-half reliability coefficient, Kuder - Richardson reliability coefficient, and Cronbach’s alpha coefficient were obtained for the sixty item test. The analysis yielded the Cronbach’s alpha coefficient of 0.90. Since the test was fairly long and the alpha coefficient was also quite high, an attempt was made to develop two short versions of equal length by randomly dividing the test items. The 60 item version was, then, correlated with the already established abstract reasoning test, using N = 500. The correlation between the new and an established test was 0.24, significant at. 01 level.

## Question number: 61 (2 of 5 Based on Passage) Show Passage

» Statistics & Research Methods » Inferential Statistics

Appeared in Year: 2015

MCQ▾

### Question

Which one of the following conclusion can be drawn from the data provided above?

The new Abstract Thinking Test has: (December)

### Choices

Choice (4) Response

a.

Unsatisfactory concurrent validity

b.

Satisfactory convergent validity

c.

Satisfactory concurrent validity

d.

Satisfactory divergent validity

## Question number: 62 (3 of 5 Based on Passage) Show Passage

» Statistics & Research Methods » Inferential Statistics

Appeared in Year: 2015

MCQ▾

### Question

What is the expected Cronbach alpha for the short versions, referred to in the paragraph? (December)

### Choices

Choice (4) Response

a.

0.82

b.

0.67

c.

0.90

d.

0.45

## Question number: 63 (4 of 5 Based on Passage) Show Passage

» Statistics & Research Methods » Inferential Statistics

Appeared in Year: 2015

MCQ▾

### Question

In the above context, which one of the following correlation should be computed to obtain item-remainder correlations? (December)

### Choices

Choice (4) Response

a.

Tetrachoric correlation

b.

Phi-coefficient

c.

Rank difference correlation

d.

Point biserial correlation

## Question number: 64 (5 of 5 Based on Passage) Show Passage

» Statistics & Research Methods » Inferential Statistics

Appeared in Year: 2015

MCQ▾

### Question

To obtain inter-item correlations, which one of the following correlation coefficient should be used in the above analysis? (December)

### Choices

Choice (4) Response

a.

Biserial correlation

b.

phi-coefficient

c.

Point biserial correlation

d.

Rank difference correlation

## Question number: 65

» Statistics & Research Methods » Inferential Statistics

MCQ▾

### Question

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

### Choices

Choice (4) Response

a.

b.

c.

d.