Psych Stats

Statistics Foundations Questionnaire

1. Which of the following best defines 'Statistics'?Answer: The science of collecting, organizing, analyzing, and interpreting data.

2. In a study, a researcher defines a characteristic of an individual as a 'Variable.' What does this term represent?

Answer: A characteristic of an item or individual.

3. If you are investigating how 'study hours' affects 'exam scores,' which one is the independent variable?

Answer: Study hours (the cause).

4. If the variable is 'Hours spent playing video games,' what would be an example of data?

Answer: 5 hours (the actual value recorded).

5. When a researcher considers every single individual in a specific group, they are defining a:

Answer: Population.

6. A researcher collects data from a 'portion of the population.' What is this portion called?

Answer: Sample.

7. Which of these is defined as a 'measure that describes a population'?

Answer: Parameter (e.g., population mean).

8. If you calculate the average height of a 'sample' of students, what is that measurement called?

Answer: Statistic (e.g., sample mean).

9. True or False: A 'Sample Mean' is an example of a Statistic.

Answer: True.

10. Which type of data represents 'groupings or labels'?

Answer: Qualitative (Categorical) data.

11. Which of the following is an example of Quantitative (Numerical) data?

Answer: The number of siblings a person has.

12. The 'Nominal Scale' is used for data that has:

Answer: Categories with no rankings.

13. A survey asks customers to rate their satisfaction as 'Low,' 'Medium,' or 'High.' Which scale is this?

Answer: Ordinal (it has a ranking).

14. Which measurement scale has 'no zero point' and only allows for addition and subtraction?

Answer: Interval Scale.

15. The 'Ratio Scale' is unique because it involves a:

Answer: True zero point (meaning none of the characteristic exists).

16. Which of these is a typical example of data on an 'Interval Scale'?

Answer: IQ Scores or Temperature in Celsius.

17. Height, weight, and salary are classified under which scale of measurement?

Answer: Ratio Scale.

18. What mathematical operations are allowed with Ratio data?

Answer: Multiplied, divided, added, and subtracted.

19. Standardized tests are usually categorized as which scale?

Answer: Interval Scale.

20. Why is 'Gender' considered a Nominal Scale measurement?

Answer: Because it involves categories with no inherent mathematical ranking.

21. In a study on how 'diet type' affects 'weight loss,' what is the dependent variable?

Answer: Weight loss (the effect).

22. Which of these is an example of 'Categorical' (Qualitative) data?

Answer: Brand name of a smartphone.

23. Letter grades (A, B, C, D, F) are which type of measurement scale?

Answer: Ordinal.

24. Which level of measurement allows you to say one value is 'twice as much' as another?

Answer: Ratio.

25. Why is temperature in Celsius Interval and not Ratio?

Answer: Because 0°C does not mean "no temperature"; it is just a point on the scale.

26. In your notes, the 'hours spent playing video games' example identifies the game time as:

Answer: The independent variable.

27. Which of these best describes a 'Sample Mean'?

Answer: A value that describes a specific sample.

28. A survey result of "Blue, Red, Green" is an example of:

Answer: Categorical/Nominal data.

29. True or False: The Ordinal Scale tells you the order, but not the exact distance between values.

Answer: True.

30. What is the primary difference between Interval and Ratio?

Answer: Ratio has a true zero point; Interval does not.