24)____________Â Â Â Â Â Â An SAT prep course claims to improve the test scores of students. The Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â table shows the scores...

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24)______Â Â Â Â Â Â An SAT prepcourse claims to improve the test scores of students. The
Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â tableshows the scores for seven students the first two times theytookÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â
25)_Â Â Â Â the verbal SAT. Beforetaking the SAT for the second time, each
Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â studenttook a course to try to improve his or her verbal SATscores.Â Â
Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Test the claim at a = .05. List the a) nullhypothesis b) averagedifferenceÂ Â Â Â Â Â Â
Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â betweenthe scoresÂ Â Â Â Â Â Â Â
Â Â Â Â Â Â Â Â Â
Student
1
2
3
4
5
6
7
Score on
First SAT
308
456
332
443
306
471
432
Score on
Second SAT
421
524
400
421
348
589
391
26) Â Â In a crash test at five miles perhour, the mean bumper repair cost for 14
Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â midsizecars was $547 with a standard deviation of $85. In a similartestÂ Â Â Â Â Â Â Â Â Â Â Â Â Â
Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â of23 small cars, the mean bumper repair cost was $347 with astandardÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â
27)______ deviation of $185. At a = 0.05, can youconclude that the mean bumper
Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â repaircost is the same for midsize cars and small cars? Listthe
Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 26)p-value 27) accept or reject.

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Ans let d difference of score on First SAT and score on second SAT a null hypothesis is H0ud 0 b average differencebetween the scores average difference 113 68 68 22 42 118 41 using excel we have tTest Paired Two Sample for Means See Answer

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