A psychology professor of a very large class wanted to know whether students who turned in their tests first had different scores than the overall mean on the test. The overall mean score on the test was 85 with a standard deviation of 14; the scores were approximately normally distributed. The mean score for the first 25 tests was 80. Which of the following is true?

The research hypothesis is that people that turn in their tests first will score lower than the overall mean on the test

The research hypothesis is that people that turn in their tests first will not score differently from the overall mean on the test

The null hypothesis is that people that turn in their tests first will not score differently than the overall mean on the test

The research hypothesis is that people that turn in their tests first will score higher than the overall mean on the test

Answer rating: 100% (QA)

H 0 is the null hypothesis because the students average score is 85 or 85 vs Alternati... View the full answer