Answer: A. The difference of the two means is significant at the 68% confidence level, so the null hypothesis must be rejected.
Step-by-step explanation:
I just got it right on PLATO, so I know it’s 100% correct.
D the argument is not valid because the conclusion does not follow from the premises
3.22$ because your originally spending 35$ so the added 3.22$ makes up 38.22$
