Understanding Frequencies and Percentages

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Exercise 6 – Understanding Frequencies and Percentages

Name: _______________________________

  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?

 

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

leave?

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

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

  1. 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.
  2. 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.
  3. What were the four most common psychological symptoms reported by this sample of patients

with COPD? What percentage of these subjects experienced these symptoms? Was there a significant difference between the moderate and severe airflow limitation groups for

psychological symptoms?

  1. What frequency and percentage of the total sample used short-acting β2 -agonists? Show your

calculations and round to the nearest whole percent.

  1. Is there a significant difference between the moderate and severe airflow limitation groups

regarding the use of short-acting β 2 -agonists? Provide a rationale for your answer.

  1. Was the percentage of COPD patients with moderate and severe airflow limitation using short acting β 2 -agonists what you expected? Provide a rationale with documentation for your answer
  2. Are these findings ready for use in practice? Provide a rationale for your answer

Exercise 8 – Measures of Central Tendency: Mean, Median, and Mode

  1. The number of nursing students enrolled in a particular nursing program between the years of

2010 and 2016, respectively, were 563, 593, 606, 520, 563, 610, and 577. Determine the mean

( X ), median ( MD ), and mode of the number of the nursing students enrolled in this program.

Show your calculations.
  1. What is the mode for the variable inpatient complications in Table 2 of the Winkler et al. (2014) study? What percentage of the study participants had this complication
  2. Does the distribution of inpatient complications have a single mode, or is this distribution

bimodal or multimodal? Provide a rationale for your answer.

  1. As reported in Table 1 , what are the three most common cardiovascular medical history events in this study, and why is it clinically important to know the frequency of these events?
  2. What are the mean and median lengths of stay (LOS) for the study participants?
 
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