What is the maximum amount of time spent studying? 6. What is the minimum amount of time spent studying?

INSTRUCTIONS TO CANDIDATES

ANSWER ALL QUESTIONS

Practice Exercise 1: Central Tendency and Variability

Directions: Use the Frequencies option in SPSS to answer the questions based on the following scenario.

Scenario:

A teacher asked his students how much time they spent studying for their statistics exam. The results (in minutes) were:

222 161 239 135 209 179 222 201 228 222 235 228 179 47 238 150 99 201

Questions:

1. What is the value of n?

2. What is mean amount of time spent studying?

3. What is the median amount of time spent studying?

4. What is the value of the mode?

5. What is the maximum amount of time spent studying? 6. What is the minimum amount of time spent studying?

7. What is the range of times spent studying?

8. What is the value of the standard deviation for this set of study times?

9. What is the value of the variance for this set of study times?

10. Was the median equal to one of the study times that was included in the data? Why.

11. For this example, which measure of central tendency would be the most appropriate measure to report? Why.

12. What is the standard abbreviation for the mean when reporting the findings in an article?

13. What is a standard abbreviation for the median when reporting the findings in an article?

14. What is the relationship between the standard deviation and variance?

15. What is a standard abbreviation to the standard deviation?

16. Write a statement as it might appear in an article that reports the measures of central tendency and variability.

Attachments:

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