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Exercise 6 Understanding Frequencies and Percentages

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Exercise 6 Understanding Frequencies and Percentages

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  • September 9, 2024
  • 3
  • 2024/2025
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Exercise 6: Understanding Frequencies and
Percentages
1. What are the frequency and percentage of the COPD patients in the severe airflow limitation

group who are employed in the Eckerblad et al. (2014) study?

 7, 14%

2. What percentage of the total sample is retired? What percentage of the total sample is on sick

leave?

 Retired: 61%, Sick leave: 15%

3. What is the total sample size of this study? What frequency and percentage of the total sample

were still employed? Show your calculation and round your answer to the nearest whole percent.

 Total sample size: 91, Frequency: 14, Percent: 14/91=0.1538X100=15%

4. What is the total percentage of the sample with a smoking history-either still smoking or

former smokers? Is the smoking history for study participants clinically important? Provide a

rationale for your answer.

 Still smoking:25%, Former smoker: 63%, 63+25=88/91X100=97%

 Yes, a smoking history provides insight into possibilities for future ailments.

5. What are pack years of smoking? Is there a significant difference between the moderate and

severe airflow limitation groups regarding pack years of smoking? Provide a rationale for your

answer.

 The amount of packs of cigarettes smoked in a specific number of years, 1 pack year

equals smoking 1 pack per day for a year.

 The p value is 0.177 which means there is no significant difference between moderate

and severe airflow limitation groups regarding pack years of smoking

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