The average SAT score for a local high school was 1100. One teacher is convinced that the 25 students who were in his homeroom performed better than the average student in the high school. Their average score was 1125 with a standard deviation of 100.
a. Calculate t .
b. Evaluate the teacher's "hypothesis" in light of t .

Question

The average SAT score for a local high school was 1100. One teacher is convinced that the 25 students who were in his homeroom performed better than the average student in the high school. Their average score was 1125 with a standard deviation of 100. 
a. Calculate t . 
b. Evaluate the teacher's "hypothesis" in light of t .

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The Answer of The average SAT score for a local high school was 1100. One teacher is convinced that the 25 students who were in his homeroom performed better than the average student in the high school. Their average score was 1125 with a standard deviation of 100. 
a. Calculate t . 
b. Evaluate the teacher's "hypothesis" in light of t .

The Average SAT Score for a Local High School Was