Statistics & Research Methods (CBSENET (UGC) Psychology (PaperII & PaperIII)): Questions 121  126 of 172
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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 itemremainder 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 testretest 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 splithalf reliability. The correlation between scores based on odd items and the scores based on even items was found to be 0.60. The splithalf reliability coefficient was obtained after applying SpearmanBrown 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 productmoment 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
Question
Which of the following correlation is suitable while computing itemremainder correlation in the above analysis?
Choices
Choice (4)  Response  

a.  Spearman rank difference correlation 

b.  Phicoefficient 

c.  Multiple correlation 

d.  Pointbiserial correlation 

Question number: 122
» Statistics & Research Methods » Inferential Statistics
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
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
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 

Question number: 125
» Statistics & Research Methods » Inferential Statistics
Question
Which of the following is an advantage of “Correlation method”.
Choices
Choice (4)  Response  

a.  Relationship may be coincidental 

b.  Causeandeffect relationship cannot be confirmed 

c.  Demonstrates the existence of relationship 

d.  Little or no control is possible 

Question number: 126
» Statistics & Research Methods » Factor Analysis
Appeared in Year: 2014
Question
A study employed two groups, matched on intelligence, each group with 30 subjects. Each subject was required to learn a list of CVC trigrams and the number of trials required to learn the list was the dependent variable. What would be the degrees of freedom if a suitable t test is used to evaluate the mean difference? (December)
Choices
Choice (4)  Response  

a.  60 

b.  58 

c.  30 

d.  29 
