(a) a four-point effect, with a sample size of 13. (b) a ten-point effect, with

Question

(a) a four-point effect, with a sample size of 13.

(b) a ten-point effect, with a sample size of 29.

(c) a seven-point effect with a sample size of 18. (Interpolate)

cas statistics 1oe.pdf (SECU Adobe Reader RED) File Edit View Window Help Open 11.6 FOUR A POSSIBLE OUTCOMES 11.7 IF Ho REALLY IS TRUE 11.8 IF Ho REALLY IS FALSE BECAUSE OF A LARGE 1.9 IF H0 EALLY IS ALSE BECAUSE OF SMALL 11.10 NFLUENCE OF SAMPLE SIZE 11.11 POWER AND SAMPLE SIZE Summary Important Term Review Questions E-P 2 ESTIMATION CONFIDENCE INTERVALS) 750 2.1 POINT Ask me a 59 of 5&1 Tools Fill & Sign Comment 259 11.11 POWER AND SAMPLE SIZE Power Curve for 1-Sample z Test 1.0 Sample Size 0.8 Assumptions Alpha 0.05 Alternative 0.6 0.4 0.2 0.0 10 12 14 Difference (Effect Size) FIGURE 11.7 Power curve by Minitab for vitamin C experiment, given N 29 (solid line) and N- 13 (broken line). size.* With just a few key strokes, M ab's Power and Sample Size software a 40 1018/2016 2 19 PM

Explanation / Answer

At four points, the dotted curve correponds to a power of 0.2

At ten points, the solid curve corresponds to a power of 1 as seen.

18 can be approximated as (29 + 2*13)/3 = 18.33 Thus, the effect line should be one made by 2 parts of 13-line and one part of 29 line. hence, the answer would be 2/3* 0.5 +1/3*0.8 = 0.6

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