Tom Wolfson is absolutely convinced that his school for Standard Tests is effective in helping students raise their SAT scores. Test whether Wolfson school students have a mean score greater than 1017, which is the mean for the general population. Use these results from 49 subjects, who took the Wolfson course prior to taking the SAT.
Sample mean = 1040;
Sample s. d. = 207.
Use a 0.01 significance level.
What type of error could you have made in your decision?