A Medical Researcher Interested in Asthma Symptoms Wanted to Know

Multiple Choice

A medical researcher interested in asthma symptoms wanted to know how symptoms were affected in dry versus humid conditions.The researchers recruited 18 asthma patients to spend four weeks under two conditions: sleeping with a dehumidifier for two weeks to create a "dry" environment and sleeping with a humidifier for the remaining two weeks to create a "humid" environment.Patients were asked to rate their symptoms at regular intervals using a scale from "0 - no symptoms" to "20 - maximum asthma symptoms." The change in asthma symptoms from dry to humid conditions was 5.82, showing a reduction of symptoms in humid conditions.What was the descriptive statistic in this study?

A) change in responses on the scale of 5.82 on average
B) four weeks, with two weeks under each condition
C) 18 asthma patients
D) two sleeping conditions, dry and humid