A group of college students believes the average grades in psychology courses are different than the average grades in biology courses. The
group found the average psychology grades of a sample of 18 students
was 82.5 and the average biology grades of a different sample of 21
students was 81.8. What is the null hypothesis of this study?

step-by-step explanation:

through just a quick inspection, one can see that the graph of this cubing function starts in quadrant iii and ends in quadrant i.   when x = 0, y = 3, so the y-intercept is (0, 3).

if graphs are part of the problem statement, share them.   .

so, converting firstly the mixed fractions to improper fractions and then "adding".

28

step-by-step explanation:

because that's the answer