2.6.7 Types Of Data And Levels Of Measurement

Question 1

explain how you collected primary data in your experiment

Answer 1

using the Pittsburg Sleep Quality Index (PSQI)

Question 2

outline one strength of primary data collected in your experiment

Answer 2

• been collected purposely for the investigation that I’m doing so it meets the full criteria
• can check data has been collected carefully and ethically

Question 3

outline one weakness of primary data collected in your experiment

Answer 3

• self-reported
• social desirability bias (people may have lied)
• retrospective (think past to past)

Question 4

explain how you collected quantitative data in your experiment

Answer 4

• we worked out the scores on the PSQI which asked closed questions

Question 5

outline one strength of quantitative data collected in your experiment

Answer 5

• analyse objectively
• analysed statistically
• using a Mann-Whitney

Question 6

outline one weakness of quantitative data collected in your experiment

Answer 6

• lacks depth > doesn’t fully understand the reason for level of sleep quality
• no cause and effect

Question 7

identify the level of measurement in your experiment

Answer 7

• collected ratio data
• analysing at ordinal level