1.Describe and explain the normal distribution and some of the various ways of expressing scores and bands

1.Describe and explain the normal distribution and some of the various ways of expressing scores and bands

2.How is the average of a normal distribution measured and what should be the relationship between the three types of measure?

3.What is standard deviation and how does it help you to understand the spread of scores on a test?

4.What is reliability and how is it measured? Refer to Classical Test Theory as necessary.

5.What is standard error of measurement and how should you use confidence intervals to express the scores you obtain from a test administration?

6.What is standard error of the mean and why is a sample population of 150 for each age group generally considered to be sufficient for standardisation purposes?

7.What is validity and how is it measured?

8.Briefly explain the relationship between reliability and validity.