Chapter 3 Application Questions

Chapter 3 Application Questions - 70, .50 of the sample is...

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Shawnae Cristobal Statistics Professor DeNike September 15, 2008 Box #283 Chapter 3: Application Questions Page 61-62 #s 19-25 odd 19. (a) 35% of the sample scored at or below the score (b) the score occurred 40% of the time (c) it is one of the highest and least frequent scores (d) it is one of the lowest and least frequent scores (e) 50 participants had either your score or a score below it (f) 60% of the area under the curve and thus 60% of the distribution is to the left of your score. 21. (a) 70,72,60,85,45 (b) because .20 if the area under the curve is to the left of 60 it’s at the 20 th percentile (c) with .50 of the area under the curve to the left of
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Unformatted text preview: 70, .50 of the sample is below 70 (d) with .50 of the area under the curve below 70, and .20 of the area under the curve below 60, then .50-.20=.30 of the area under the curve is between 60 and 70 (e) .20 (f) with .30 of the scores between 70 and 80, and .50 of the area under the curve below 70, a total of .30+.50=.80 of scores are below 80, so its at the 80 th percentile. 23. Score f Relative f cf 53 1 .06 18 52 3 .17 17 51 2 .11 14 50 5 .28 12 49 4 .22 7 48 .00 3 47 3 .17 3 25. Score f Relative f cf 16 5 .33 15 15 1 .07 10 14 .00 9 13 2 .13 9 12 3 .20 7 11 4 .27 4...
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