Statistical Methods for Psychology

58 Chapter 2 Describing and Exploring Data c. calculate the square root of the answer for part (b). d. what are the units of mea ...

Exercises 59 2.25 Rogers and Prentice-Dunn (1981) had subjects deliver shock to their fellow subjects as part of a biofeedback s ...

60 Chapter 2 Describing and Exploring Data 2.29 The following data represent the total number of households, the number of house ...

Exercises 61 2.38 In one or two sentences, describe what the following graphic has to say about the grade point averages for the ...

62 Chapter 2 Describing and Exploring Data 2.49 Create a boxplot for the data in Exercise 2.1. 2.50 Create a boxplot for the dat ...

a. Create a set of data for boys and girls that would produce these results. (No, I did not make an error in reporting the resul ...

This page intentionally left blank ...

CHAPTER 3 The Normal Distribution CHAPTER 3 The Normal Distribution Objectives To develop the concept of the normal distribution ...

FROM WHAT HAS BEEN SAIDin the preceding chapters, it is apparent that we are going to be very much concerned with distributions— ...

probability in its common everyday usage, referring to the likelihood that some event will occur. From this perspective it is lo ...

sum areas in exactly the same way that we did in the pie chart. When we move to more common distributions, particularly the norm ...

symmetric, unimodal distribution, frequently referred to as “bell shaped,” and has limits of 6`. The abscissa,or horizontal axis ...

interested in the distribution of errors in astronomical observations. In fact, the normal distribution is variously referred to ...

assumed) it doesn’t automatically suggest a reason for having an appendix that tells all about it. The reason is quite simple. B ...

score of from a distribution with a mean of 0 and a variance, and standard deviation, of 1—denoted N(0,1). Then anything that is ...

3.3 Using the Tables of the Standard Normal Distribution As already mentioned, the standard normal distribution is extensively t ...

standard deviation from the mean, if the total area under the curve is taken to be 1.00. (Re- member that we care about areas be ...

From Appendixzwe know that the area from the mean to z 52 2.0 is 0.4772 and from the mean to z 52 1.0 is 0.3413. The difference ...

76 Chapter 3 The Normal Distribution the limits encompassing 95% of the population, we want to find those scores that are 1.96 s ...

that look normal but aren’t, and these are often followed by statements of how distorted the results of some procedure are becau ...