A professor was interested in whether the average Final Grade for her class of 140students in spring 2018was any different from the years prior to 2018. Read the SPSS output below and use it to answer the following questions.

\fOne-Sample Test Test Value = 83 95% Confidence Interval of the Mean Difference df Sig. (2-tailed) Difference Lower Upper Final Grade 1.533 139 127 1.76971 -.5122 4.0516