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A coaching company believes that coaching improves the SAT scores of high school students. To test their theory, they get two samples of students, one that was coached and one that was not. They record their improvement in test scores over two separate tests. Use the traditional method and test to see if coaching improves their test scores more than not coaching using α = 0.05.
coached: = 29
S1= 59
n1= 427
not coached:= 21
S2= 52
n2 = 2733
Test the same hypothesis using p-value
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questiona it is noted that 8 of kaplan students are left handed. if twenty 20 students are randomly selectednbsp
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