Statistics in Psychology (MPC-006) - IGNOU MA Psychology Assignment

Statistics in Psychology (MPC-006)

TUTOR MARKED ASSIGNMENT

TMA

Course Code: MPC-006

Assignment Code: ASST/TMA/2010-11

Marks: 100

Note: Attempt all the questions. Each question carries 10 marks.

1. What do you mean by parametric statistics? What are the basic assumptions of parametric statistics and why are they essential? Discuss with suitable examples. 10

2. Distingnish between parametric and nonparametric statistics. Why the parametric statistics are considered more powerful than the nonparametric statistics. Explain. 10

3. What is statistical error? Explain Type I Error and Type II error with suitable example. 10

4. Distinguish between Partial and multiple correlation. If r₁₂ =0.70, r₁₃=0.54 and r₂₃=0.68, find the value of r_1.23 and r_2.13 10

5. If two regression lines are expressed as x+2y-5=0 and 2x=3y-8=0 10

(i) Which of the two can be called regression of y on x and of x on y

(ii) Find x and y and correlation coefficient between x and y

6. What is normal distribution? Explain clearly the role of normal distribution in statistical analyses. 10

7. The following table gives hypothetical scores of students of three different SES conditions from 4 different schools. 10

SES Conditions

Schools		Low	Moderate	High
	I	15	20	15
	II	15	10	25
	II	6	14	16
	IV	8	17	15

Compute out analysis of variance to examine whether there is significant difference in scores (i) due to their Socio Economic conditions or (ii) due to the school conditions. Also find out whether there is an interaction between SES conditions and school factors

8. Chi-sauare is a test of "Independence, homogenity and goodness of fit" Explain. 10

9. Discuss the importance of Mann - Whitney 'U' test. Find the 'U' value for the scores of the following two groups. 10

Exp. Group: 16, 5, 9, 10

Control Group: 12, 7, 10, 12, 17

10. Performance scores of three matched group of employees under three different conditions are given in the table below. Apply Kruskal-Wallis "H" test and interpret the results 10

Conditions

Employee	Favourable	Unfavourable	Normal
	20	12	17
	19	14	15
	26	07	16
	27	14	14
	30	18	13
	25	10	12

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