Statistical Methods for Psychology

278 Chapter 9 Correlation and Regression to first-grade children, and then administered the Wide Range Achievement Test (WRAT) t ...

9.12 One Final Example I want to introduce one final example because it illustrates several important points about correlation a ...

280 Chapter 9 Correlation and Regression same purposes, although our variables contain enough random error that it is difficult ...

otherwise stated. (We do occasionally fit straight lines to curvilinear data, but we do so on the assumption that the line will ...

282 Chapter 9 Correlation and Regression figure represents the relation between college GPAs and scores on some standard achieve ...

Section 9.15 Power Calculation for Pearson’s r 283 200 Weight 150 100 60 Height Male Female 65 70 75 Figure 9.9 Relationship bet ...

284 Chapter 9 Correlation and Regression you consider all the variables involved in aggressive behavior. This value is in line w ...

Exercises 285 Exercises 9.1 The State of Vermont is divided into 10 Health Planning Districts, which correspond roughly to count ...

286 Chapter 9 Correlation and Regression 9.8 Assume that a set of data contains a slightly curvilinear relationship between Xand ...

Exercises 287 These data do not really reveal the pattern that we would expect. What do they show? (In Chapter 15 we will see th ...

288 Chapter 9 Correlation and Regression 9.26 Make up your own example along the lines of the “smoking versus life expectancy” e ...

Exercises 289 c. What is the correlation coefficient for these data? d. Are the correlation coefficient and the slope significan ...

290 Chapter 9 Correlation and Regression Height Weight Height Weight 68 125 62 108 66 130 63 95 65.5 120 64 125 66 130 68 133 62 ...

Exercises 291 might have come from such a study are to be found on the Web site in a file named AirQual.dat in case you want to ...

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CHAPTER 10 Alternative Correlational Techniques CHAPTER 10 Alternative Correlational Techniques Objectives To discuss correlatio ...

THEPEARSON PRODUCT-MOMENT CORRELATION COEFFICIENT(r) is only one of many avail- able correlation coefficients. It generally appl ...

levels) on one or both measures. We may need to be somewhat cautious in our interpreta- tion, and there are some interesting rel ...

296 Chapter 10 Alternative Correlational Techniques Table 10.1 Calculation of point-biserial correlation for weights of males an ...

weight for females. These values are shown in Table 10.1, along with the correlation coef- ficient. The slope of the line is neg ...