Basic Statistics in Psychology — DU Psychology Honours Previous Year Question Papers

(d) Statistical tables and graph papers will be provided. (Numerical Computation) Í. (a) Draw a frequency polygon of the data given below : 7 (Short Questions) 11.(a) What is the importance of statistics in Psychological Research ? 3 (b) Which property of mean makes it the most used measure of central tendency and why? (c) Write any three properties of the standard deviation. 3 7. Discuss the properties of the mean and median of central tendency. Describe the characteristics and limitations of the range, semi-interquartile range. 5,5 8. What are the properties of the z-score ? Evaluate the difference between the z-score and percentiles. 5,5 9. Discuss the nature of the normal probability curve. 10 10. Discuss the scatter diagram of correlation. Explain the meaning of direction and the degree of Correlation. 10 Class Interval Frequency (b) Find P 50 from the above-given data. 4 (c) Calculate percentile rank for a score of 62. 2. Compute the median, mean, variance and Standard deviation of the data: 4,3,3,5 3. In a normal distribution of 400 test scores, with a mean of 50 and a standard deviation of 10, how many scores fall: 5,5,5 (iii) Between 35 and 55 4. Compute the correlation value with the Pearson product-moment: 15 5. Given below are the ranks assigned by 2 interviewers to ten applicant. Find the correlation between the 2 ratings using an appropriate method of correlation. 15 Descriptive Statistics ? Discuss various Levels of measurement. 10