Statistical Methods for Psychology

5.3 Discrete versus Continuous Variables In Chapter 1, a distinction was made between discrete and continuous variables. As math ...

presents the distribution of responses for several of these aspects. The possible values of X (the rating) are presented on the ...

For example, we might be interested in the probability that an infant will start walking at 14 months plus or minus one-half mon ...

The special branch of mathematics dealing with the number of ways in which objects can be put together (e.g., the number of diff ...

Here there are 12 possible orderings of winners, and the ordering makes an important difference—it determines not only who wins, ...

For our example, Let’s return to the example involving slides to be presented to subjects. When we were dealing with permutation ...

subjective or personal probabilities, meaning that they are a statement of person belief, rather than having a frequentist or an ...

Before we had the results of the drug test our subjective probability of his guilt was .10 because only 10% of the team used ste ...

the witness’ testimony, and not enough weight on the prior probabilities. Here is a situa- tion where the discrepancy between wh ...

(One approach is to choose a variety of reasonable estimates, and note how the results hold up under those different estimates. ...

To illustrate the binomial distribution we will take the classic example often referred to as perception without awareness, or t ...

the probabilities for each outcome between 0 and 10 correct out of 10, we would find the results shown in Table 5.4. Observe fro ...

given experiment) rather than individual observations or events. We have already discussed sampling distributions in Chapter 4, ...

For the distribution on the left of Figure 5.5, the stimulus is set at a speed that just barely allows the participant to respon ...

chance level? Put another way, are we likely to have seven out of eight correct choices if the judge is really operating by blin ...

variety of settings. Suppose we hypothesize that when people know each other they tend to be more accepting of individual differ ...

134 Chapter 5 Basic Concepts of Probability Exercises 5.1 Give an example of an analytic, a relative-frequency, and a subjective ...

Exercises 135 a. What is the probability that you will win the grand prize? b. What is the probability that your brother will wi ...

136 Chapter 5 Basic Concepts of Probability 5.17 Using Appendix Data Set or the file on the web named ADD.dat, a. What is the pr ...

Exercises 137 be computing some very large numbers, which may lead to substantial rounding error. The value of .0011 is what my ...