Week 2

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1. Fluctuation of the value of a statistic from one sample from a population to another sample.
Sampling error
2. Theoretical distribution of a statistic using an infinite number of samples as a basis and the values of the statistic used in the distribution.
Sampling distribution
3. Theoretical distribution of an infinite number of means of samples.
Sampling distribution of the mean
4. Standard deviation of the infinite number of means in the sampling distribution of the mean.
Standard error of the mean
5. Statistical estimation using information from a sample to estimate a single statistic to represent a population parameter.
Point estimation
6. Range of values within which a population parameter is estimated to lie.
Confidence interval
7. Hypothesis that states there is no relationship between the variables of interest.
Null hypothesis
8. Hypothesis that states there is a relationship between variables of interest.
Alternate hypothesis
9. Error created when rejecting the null hypothesis when it is actually true.
Type I error
10. Error created when accepting the null hypothesis when it is actually false.
Type II error
11. Level designating the established risk of committing a type I error.
Alpha level
12. The probability of committing a type II error.
Beta
13. The probability of correctly rejecting a false null hypothesis.
Power
14. Statistical tests that involve assumptions about variable distribution, estimation of a parameter, and use of scale measures.
Parametric tests
15. Class of inferential statistics that do not make assumptions about variable distribution.
Non-parametric tests
16. Test of statistical significance in which only values at one extreme of a distribution are considered in determining significance.
One-tailed test
17. Test of statistical significance in which values at both extremes of a
distribution are considered in determining significance.
Two-tailed test
18. Area of the sampling distribution representing values which are “improbable” if the null hypothesis is true.
Critical region
19. Concept representing the number of things free to vary about a parameter. A way to take sample size into consideration.
Degrees of freedom
20. Test to evaluate the probability that the value of the sample mean equals that of population mean.
One-sample t-test
21. Standard deviation of the difference between sample distribution means and that of the population mean.
Standard error of the difference
22. Test to determine the probability that the means of two groups are equal, when the groups are independent of each other.
Independent groups t-test
23. Test to determine the probability that paired means are equal; two
groups/measurements are tested to determine if they differ.
Paired t-test
24. Index of the magnitude and direction of the relationship between a continuous variable and a dichotomous variable.
Point biserial correlation
25. Procedure for testing mean differences among three or more groups by comparing the variability between groups with that within the groups.
Analysis of Variance (ANOVA)
26. Variability arising from group differences in ANOVA.
Between-group variance
27. Variability arising between subjects in groups in ANOVA.
Within-group variance
28. Statistic in which variation attributable to different sources (e.g., between and within groups) is compared.
F ratio
29. Sum of squared deviation scores.
Sum of squares
30. Analysis of variance used to test the relationship between one independent variable and a dependent variable.
One-way ANOVA
31. Analysis of variance used to test the relationship between two or more independent variables and a dependent variable simultaneously.
Multifactorial ANOVA
32. Procedure for testing mean differences in a within-subject design with three or more conditions/observation periods.
Repeated measures ANOVA
33. Test for comparing all possible pairs of groups following a significant result of overall group differences (e.g., a significant ANOVA result).
post hoc test

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 Author: FlawlessEra ID: 22495 Filename: Week 2 Updated: 2010-06-07 22:12:59 Tags: week vocabulary Folders: Description: Week 2 vocabulary Show Answers:

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