Your little brother just brought home his report card and his teacher indicated that he is...

Your little brother just brought home his report card and his teacher indicated that he is struggling with his spelling. Your family looks into programs that will help him improve his spelling and request information from two different spelling programs. One program, SPELLbound, sends you information regarding the effectiveness of their program. You also receive information regarding the effectiveness of a new program on the market, Spelling Foundations. Both programs conducted stats on the pre-program and post-program performance, in the form of a t-test examining the number of errors made in 30 critical words contained in a passage. They have also provided the p values from their respective tests. The information you obtained is listed below.

SPELLbound Spelling Foundations

n = 5000 n = 30

SD = 10 SD = 10

effect size = 0.10 effect size = 0.80

p = .004 p = .031

If your little brother made 15 errors (out of the 30 critical words) at pre-test, what would his number of errors be (out of 30 critical words) after the implementation of each program, assuming his improvements were typical or average (show your calculations)?
Which program would you select for your little brother (assume the programs cost the same amount)? Explain your reasoning.

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Expert Solution

orchestra answered 1 year ago

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