By Colin Tredoux, Kevin Durrheim
This textbook presents an summary of access- and intermediate-level facts. themes comprise a overview of uncomplicated arithmetic, basic distribution concept and perform, factorial and repeated measures ANOVA, and meta-analysis. valuable details on learn tools comprises tips on how to use spreadsheets, the net, and the statistical software program applications SPSS and STATISTICA to facilitate, research, and interpret study. With an emphasis on constructing talents via perform, either the textual content and the web-based CD-ROM supply wide examples, workouts, and exams.
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Extra resources for Numbers, Hypotheses and Conclusions: A Course in Statistics for the Social Sciences
Since we can determine the frequency or proportion of scores that lie below a specified value and we can calculate the frequency or proportion of scores that lie above another specified value, we can calculate the frequency or proportion of scores that lie between the two values. Here what we do is to subtract from the total number of scores (N) or from the total percentage (100), the frequency or percentage of scores that lie below the lowest specified value (xl) and the frequency or percentage of scores that lie above the higher value (xh).
The point midway between the real lower limit and the real upper limit, is indicated on the horizontal axis. Some people like to ensure that the midpoint has an integer value by creating class intervals of which the width is an odd number. 6 As the bulk of the marks are clustered between 50 and 69%, our graph does not provide a great deal of information about the distribution. A more detailed breakdown would be useful. We could therefore choose to have class intervals of five rather than the ten employed previously.
What measure of central tendency would you use to identify a ‘typical’ patient at the hospital? 3. In a study undertaken at the Witwatersrand Technikon on people suffering from a condition called Moriti wa letswele, it was 50 NUMBERS, HYPOTHESES AND CONCLUSIONS found that in the 11–20-year group there were 7 participants; in the 21–30-year group there were 15 participants; in the 31–40-year group there were 9 participants; and in the 41–50year group there were 5 participants. What was the typical age of participants in this study?