what proportion were biology majors?
Statistics Question- z-scoreWe want to compare the grades on an exam in an intro statistics course for biology majors versus public health majors. Suppose 72% percent of the class are biology majors, while the remaining 28% are public health majors. The biology majors earned grades that are normally distributed, with a mean of 84 and a standard deviation of 10. The public health majors earned grades that are also normally distributed, with a mean of 87 and a standard deviation of 14.What exam score corresponds to the 80th percentile of the distribution for public health majors? (2pt)What proportion of the class got an A on the test (scored at least 90)? (4pt)Of the students who didnt make an A, what proportion were biology majors? (4pt)
