1. Design and data analisis in Psychology I
Chapter 3

2. Practice 1
Complete the following table, knowing that the modes are 6 and 9; and that the values 8 and 12 were observed the same times:

3. Practice 2
With these data, calculate the mean, the median and the mode:

4. Practice 3
In the following distribution, calculate the mean and the mode.

5. Practice 4
In a study related to traffic accident caused during a weekend in Andalusia, the following results were registered:
Indicate the sample size and calculate the mode, the mean and the median.

6. Practice 5
Calculate the following percentiles: D1 , C15, Q1 and P81

7. Practice 6
With the following data table, calculate decile 2 and quartile 3

8. Practice 7 In the following data set:
- Add one data, without changes both in the median and the mean.
- Add one data which makes that the mean and the median match value 3.

9. Practice 8
Calculate the mean from a data set whose median is X19.5 and that adjusts to the following table:

10. Practice 9
Calculate the median from the following data set:

11. Practice 10
Calculate the median from the following set of 35 data, knowing that the distribution is bimodal; and complete the table: