Determine the decision criterion for rejecting the null hypothesis in the given hypothesis test....statistic?

okay, you need to figure out what the critical t statistic (t_crit) is for this by determining degrees of freedom (df=n-1). at a significance level of 0.01 and a df of 14, looking at a t table, the answer is 2.977. so anything less than -2.977 or greater than 2.977 is going to, according to your statistical threshold, have a 1% chance of being that different from the null hypothesis by random variation (so you can reject the null hypothesis). if this made no sense, and you just want to get an ok grade on your homework, the answer is C.