Statistics students believe that the mean score on a first statistics test is 65. The instructor thinks that the mean score is higher. She samples 10 statistics students and obtains the scores:

Grades	64.3	63.9	62.7	69	85.5	85.5	62.7	73.5	68.4	69

Test grades are believed to be normally distributed. Use a significance level of 5%.

1. State the mean of the sample:
2. State the standard error of the sample means:
3. State the test statistic: t=
4. State the p-value:

40