(Answered) In a study of the effect of a new drug on the alleviation

Statistics

In a study of the effect of a new drug on the alleviation of asthma symptoms, the σ_M for symptom relief in the patient group that received the new drug is 1.45, and the σ_M for symptom relief in the group that did not receive the new drug is 1.22. Calculate the σ_{M1 - M2}.

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