You are researching using spirometry in order to better diagnose restrictive and obstructive lung diseases. As you make use of the Tiffeneau-Pinello index, this variable (with notation FEV%) represents the ratio of forced expired volume in one second divided by the forced vital capacity. This reflects one's lung function. The normal range for FEV% of adults is around 70% - 80%. Values lower than this estimated interval may indicate that the patient may have something that makes it difficult for him/her to breathe in using their lungs. Source: http://advantage.ok.gov/CHCC/Publications/Spirometric%20Classifications%20of%20COPD.pdf Suppose you gathered 100 randomly selected adults for your experiment relating to FEV%. Below is the overall distribution of the FEV% of your subjects. Histogram of FEV% of 100 Randomly Selected Adults 25 21 20 19 18 15 15 14 Frequency (in Percentage) 10 5 MacBook Pro 80 988 DII $ & 4 5 6 O- 8 R T Y U O P F G H C KHistogram of FEV% of 100 Randomly Selected Adults 25 21 20 19 18 15 Frequency (in Percentage) 10 70 75 80 85 90 95 100 FEV% (in percentage) If 70% - 80% FEV % is considered within normal range and we are concerned with the frequency of individuals below a value of 70% (FEV%), reading the histogram above, what is that frequency for our sample? How much of the sample may have lung problems? A) 28% OB) 21% MacBook Pro 988 DI LA % > & O- 4 5 6 8 R Y U O P F G H C K L65 70 75 80 95 100 FEV% (in percentage) If 70% - 80% FEV % is considered within normal range and we are concerned with the frequency of individuals below a value of 70% (FEV%), reading the histogram above, what is that frequency for our sample? How much of the sample may have lung problems? A) 28% B) 21% O C) 37% OD) 14% OE) 35% Previous Page Next Page Page 1 of 11 MacBook Pro 20 DII DD % & * " > 5 O - A R Y U O