Calculate σ_{M1 - M2} for a study of self-esteem between the sexes, in which the value of σ_{M} for women is 1.32 and that for men is 1.94. (choices: 1.02, 3.76, 2.35, or 7.63)

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 σ_{ M1-M2 (Choices: 1.89, 1.77, 1.93, or 1.79)}