A Medical Researcher Interested in Asthma Symptoms Wanted to Know

question 149

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.Which statement involves an inferential statistic related to this research finding?

• A) Asthma symptoms may be lowered, on average, with humid sleeping conditions.
• B) You can expect your asthma symptoms to diminish if you move to a drier climate.
• C) Varying your sleeping conditions can affect your health.
• D) Asthma symptoms increase when patients sleep with humidifiers.

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