Eight college students were randomly divided into 2 groups of 4 each to test whether background music reduces studying capacity. Each person was tasked with memorizing a list of 20 words. Group 1 had music playing through earphones they were wearing. Group 2 was not distracted. The following are the number of words correctly remembered by each subject. Test whether the music reduces studying capacity at a .05 level of significance.
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Group 1 -- DISTRACTED
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Group 2 - NOT DISTRACTED
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Sample mean = 7
Sample size = 4
Sample std.dev. = 2.5
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Sample mean = 14
Sample size = 4
Sample std.dev. = 3.5
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a) Direction = UPPER TAILED/LOWER TAILED/2-TAILED (circle one)
b) P-value = ________________
c) REJECT THE NULL or DO NOT REJECT THE NULL? (Circle one)
d) Can we conclude that music reduces studying capacity? YES or NO (circle one)