One sample t test results

P value and statistical significance:

The two-tailed P value equals 0.1365

By conventional criteria, this difference is considered to be not statistically significant.

Confidence interval:

The hypothetical mean is 75.00000

The actual mean is 73.600000

The difference between these two values is −1.400000

The 95% confidence interval of this difference:

From −3.3181050474 to 0.5181050474

Intermediate values used in calculations:

t = −1.6065

df = 11

standard error of difference = 0.871