Basic Statistics in Psychology — DU B.A (Hons.) Applied Psychology Previous Year Question Papers

3. What are standard scores and percentile ranks? Describe how they are calculated and their importance in comparing individual scores to a group. (5,5) 4. Define the normal probability curve and discuss its key properties. (10) Section C (15 Marks) 1. Descriptive Statistics (3) 2. Standard deviation (3) 3. Spearman's rank order correlation (3) 5. Application of normal probability curve (3) 3. Attempt Three questions each from sections A and B, Five questions from section C. Section A (45 Marks) 1. Calculate the Median, Mean and Mode for the following data. (15) Class Interval Frequency 2. The distribution of a class test scores of 50 students is given below. Calculate 25" percentile, and percentile rank for a score 48. (7.5,7.5) Class Interval Frequency 3. Eight students have obtained following scores in the test of English and Hindi. Calculate the correlation coefficient between scores of English and Hindi tests using product moment method. (15) 4. On the assumption that IQ's are normally distributed in the population with the mean of 100 and standard deviation of 15, what percentages of cases fall? (c) Between 75 and 125 IQ (5,5,5) A group of 5 students obtain following scores on the two test of aptitude test X and test Y: (15) Scores in X test 3. 5 4 6 Scores in Y test 5 8 11 7 9 Determine regression equations for both tests. Section B (30 Marks) 1. Define measurement and describe the different levels of measurement. (10)