Statistical Methods for Psychology

7.2 I drew 50 samples of 5 scores each from the same population that the data in Exercise 7.1 came from, and calculated the mean ...

Exercises 219 7.14 Compas and others (1994) were surprised to find that young children under stress actually report fewer sympto ...

7.21 For the data in Exercise 7.19, create a scatterplot and calculate the correlation between husband’s and wife’s sexual satis ...

Exercises 221 Control Cognitive Therapy 2 0.5 3.3 1.7 2 9.1 2 9.3 11.3 0.7 2.1 2 5.4 0.0 2 0.1 2 1.4 12.3 2 1.0 2 0.7 1.4 2 2.0 ...

number of simple arithmetic problems the subjects can solve in 2 minutes. The data obtained are: Expectation good: 19 15 22 13 1 ...

Exercises 223 Discussion Questions 7.51 In Chapter 6 (Exercise 6.38) we examined data presented by Hout et al. on the sexual sat ...

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CHAPTER 8 Power CHAPTER 8 Power Objectives To introduce the concept of the power of a statistical test and to show how we can ca ...

UNTIL RECENTLY, MOST APPLIED STATISTICAL WORKas it is actually carried out in analyzing experimental results was primarily conce ...

For expository purposes we will assume for the moment that we are interested in test- ing one sample mean against a specified po ...

decreasing band increasing power, although with a corresponding rise in the probability of a Type I error. Power as a Function o ...

If an experimenter concerns himself with the power of a test, then he is most likely interested in those variables governing pow ...

3.Use of special conventions. When we encounter a situation in which there is no way we can estimate the required parameters, we ...

function of n[i.e., f(n)] will be defined differently for each individual test. The convenient thing about this system is that i ...

Since clients generally come in whole lots, we will round off to 72. Thus, if the experi- menter wants to have an 80% chance of ...

considerations ( , , and s), about which we can do relatively little, from sample char- acteristics (n), over which we have more ...

and if her estimate of dis correct, then she has a probability of .43 of actually rejecting if it is false to the extent she exp ...

difference, and I might have been tempted to use it in a research methods course that I taught, dividing the students in the cou ...

My sample sizes were unequal, but not seriously so. When we have quite unequal sample sizes, and they are unavoidable, the small ...

available, and I can first administer the test without saying anything about Asian students typically performing better, and the ...