Question: A researcher is randomly selecting a sample for his experiment from a group of 30 high school students, 20 college students, and 10 graduate students.

A researcher is randomly selecting a sample for his experiment from a group of 30 high school students, 20 college students, and 10 graduate students. Sixty per cent of each group are females and forty per cent are males.If the researcher selects a stratified random sample of n = 10, how many will be high school students? (3 pts)Of the high school students selected in this random sample of 10, what is the probability of selecting a female? (3 pts)

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