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A researcher wants to compare the levels of recall in younger and older subjects. Her hypothesis...

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Statistics

A researcher wants to compare the levels of recall in youngerand older subjects. Her hypothesis is that if subjects are requiredto process verbal information (lists of words) older subjects doless processing and therefore will recall fewer words. Thefollowing data are from a group of older subjects and a group ofyounger subjects who were told to memorize the words presented tothem so they could be recalled at a later time. The dependentvariable is the number of correctly recalled items. Do these dataindicate a significant difference in items recalled between youngerand older adults? Use two-tailed α = .05. DATA:Younger adults: 23, 20, 16, 17, 21, 20, 20, 22, 10, 22 SS=44 M= 20.Older adults: 10, 19, 14, 5, 10, 11, 14, 15, 11, 11 SS= 126 M=12

Answer & Explanation Solved by verified expert
3.9 Ratings (572 Votes)
SD of younger adults Sqrt449 2211SD of Older adults Sqrt1269 3742Since s1s2 22113742 059 it liesbetween 05 and 2 we used the pooled varianceThe degrees of freedom used is n1    See Answer
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