Question 1192085
n = 33
sample mean = 12.15
sample standard deviation = .11
claim is population mean is 12
standard error = sample standard deviation / square root of sample size = .11/sqrt(33) = .01915.
t-score = (x - m) / s = (sample mean minus assumed mean) / standard error = (12.15 - 12) / .01915 = 7.83.
that would be the test statistic.