This graph compares the total cost of attending educational institutions in texas. The graph demonstrates that the cost at private and public technical schools greatly varies. Vocational schools greatly varies. Four-year universities greatly varies. Community colleges greatly varies.

On a test the graders have a mean of 77 and a standard deviation of 8. if we can approximate the distribution of these graders by a number distribution what percent of the students. a) scores higher than 77? b) should pass the test (grades > 60)? c) should fail the test (grades < 60)?