A researcher wants to see if a weight loss program is effective by measuring how much weight people lose when following the program. She measures the weight of 8 randomly selected women before and after the program (the below table). Is there evidence, at a 5% significance level, that the weight loss program is effective?

Person	1	2	3	4	5	6	7	8
Weight before	165	172	181	185	168	175	187	178
Weight after	143	151	156	161	152	154	172	150

Use "Weight Before-Weight After" (in that order) to prepare your test. Is this an (upper/lower/two) hypothesis test?

find the value of standard error for this problem

find the value of t-test

find the p-value Reject or not reject the null hypothesis?

State the conclusion of the procedure (be sure to mention the scope of the inference).