Suppose that 30% of female students and 25% of male students at a large high school are enrolled in an ap ® class. independent random samples of 20 females and 20 males are selected and asked if they are enrolled in an ap ® class. let ˆ p f represent the sample proportion of females enrolled in an ap ® class and ˆ p f represent the sample proportion of males enrolled in an ap ® class.
what is the value of n f p f ?
what is the value of n f ( 1 − p f ) ?
what is the value of n m p m ?
what is the value of n m ( 1 − p m ) ?
is the shape of the sampling distribution approximately normal? these values all at least 10.