1. Mr. Jacobsin, CEO of "Learning English Quick" claims that their new "WX 100 reading n writing" workshops help students to improve their English Literature grades. The following data represent grades on exam before and After WX 100 workshop.

Students	1	2	3	4	5	6	7	8	9
Grade before "WX 100 reading & writing"	73	78	83	79	83	86	62	92	68
Grades After "WX100 reading & writing"	76	77	86	83	87	91	65	95	76

Does the sample evidence suggest that Mrs. Robertson's claim is correct? Use alpha of .01 to test this claim. For 15 points

a) Set up the hypothesis and indicate the claim.

b) decision rule in complete sentence.

c) Computation.

d) Decision in complete sentence. why?

e) Interpretation in complete sentence.