Given here are the scores of 20 student who took a practical course in nutrition.

57, 60, 64.67,67,62, 61, 63, 70, 72, 73, 70, 76, 76, 75, 70, 80, 80, 78, 78

For these scores present:

I) The frequency distribution and cumulative frequency distribution.

Differentiate between 2 tailed and one-tailed tests of significance.

Establishing relationship between two variables

 Briefly explain with the help of an example the various activities of the research process.

Validity

Frequency polygon

List one mortality measure for assessing the health status of children in a community. How will you measure them? Indicate.