1. Define descriptive statistics. Discuss the methods of organising the data.

2. Discuss the concept of dispersion. Elucidate the different types of measures of dispersion.

3. Define coefficient of correlation. Calculate Pearson's product moment coefficient of correlation for the following data:

Sr. no.
X 35 20 25 15 30
Y 30 40 70 60 50

4. Find out the t-value for the following data:

X 5 6 12 11 8 8 7 6 8 7
Y 4 6 5 6 8 7 7 8 9 10

5. Explain the processes involved In hypotheses testing.

6. Compute mean, median and mode for the following data

64, 68, 67, 61, 72, 72, 62, 71, 83, 72, 75, 77,67, 72,81,78,65,86,67,82,76,76,69,70.

7. What is a scatter diagram? Discuss the steps involved in making a scatter diagram.

8. Tabulate the following scores into a frequency distribution using class interval of 10:

59,46,71,65,69,43,52,73,56,44,63,59,66,42, 70,86,32,78,27,65,86,83,63,52,70,78,49,57, 70,39,55,42,77,81,72,79,69,34,61,62.
9. Differentiate between parametric and non-parametric statistics.

Write short notes on any two of the following in about 100 words each:

10. Graphical Presentation of Data

11. Variance

12. Skewness