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Comprehensive Exam Week 6
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Terms in this set (10)
When we construct a 95% confidence interval, we are 95% sure that the
population mean falls within the interval
Differences in scores produced by the independent variable corresponds with which of the following ANOVA terms?
Treatment effect
If you are interested in how well students perform on a standardized math achievement test after they have completed a six-week math unit in either a computer-assisted class, a videotaped course, or a regular classroom, and you also want to include a factor for sex (boys vs. girls), what is the dependent variable?
The scores on the math achievement test
The null hypothesis in the chi-square test for goodness of fit is
the data fit the expected frequencies
One reason we transform data is to
make the data easier to work with
A distribution that is symmetrical, has as its middle score the score with the highest frequency, and has decreasing frequencies as scores are further from the middle score is called a(n) _____ distribution
normal
The mean is used most often in behavioral research because researchers tend to
measure variables that have interval or ratio scores, and the scores form approximately normal distributions
Pat's last statistics test score was 72. If the instructor tells Pat that the grade distribution was approximately normal, the class mean was 67, and the standard deviation was 3, which of the following is correct?
Pat should be fairly happy about this score, because many students did not do as well.
Using a correlational design, a researcher found a relationship between the healthiness of one's heart and the amount of fish oil in one's diet. The researcher should conclude that
although a relationship exists, one cannot infer that changes in one variable are causing changes in the other variable
The purpose of probability and inferential statistics is to
make decisions about whether the relationship seen in a sample would be found in the population
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