Answer to Question #327765 in Statistics and Probability for Mark

Question

Rowena wants to test a randomly selected 20 students for her study. Identify the t value of the following percentiles.

1. 75th percentile

2.90th percentile

3. 60th percentile.

4. 99th percentile

5.50th percentile

Answer 1

We use the t-table, degrees of freedom df = n - 1 = 20 - 1 = 19.

1. 75th percentile = 0.687621
2. 90th percentile = 1.327728
3. 60th percentile = 0.256923
4. 99th percentile = 2.239483
5. 50th percentile = 0