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Quiz Wk4 Essay

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Below is an essay on "Quiz Wk4" from Anti Essays, your source for research papers, essays, and term paper examples.

RES342
Week 3 Quiz

1. A frequency distribution can be shown as
• a statistic
• a histogram
• a scatter plot
• a stem and leaf plot

2. Simple statistics are
• for simpletons
• presented in stem and leaf plots
• things like correlations
• things like standard deviations

3. What would you do with a median?
• Use it do show spread.
• Use it for normally distributed data.
• Cross it against oncoming traffic
• Indicate the middle of some data.

4. The following are measures of spread:
• standard deviation
• root mean square errors
• percentile ranges
• polyunsaturated margarine

5. Describe what the standard error of the estimate is.

6. Confidence intervals...
• are a new form of sprint training.
• are calculated routinely by most stats packages.
• define the likely range of a population value.
• are inferior to p values for indicating magnitude of outcomes.
7. An outcome measured on a five-point scale (not at all to always)...
• is an example of an ordinal variable.
• has a behavior problem when it comes to residuals.
• should be analyzed by logistic regression.
• can be analyzed by ANOVA.
8. Dimension reduction
• describes loss of precision.
• describes factor analysis.
• is an example of ANOVA.
• is a weight-loss program.

9. Concerning reliability:
• It impacts most on descriptive studies.
• It can be expressed as an ICC.
• It can be expressed as a CV.
• It is quantified by 2-way ANOVA.

10. Concerning validity:
• It impacts most on descriptive studies.
• It is the correlation between true and observed values.
• A valid measure must be reliable.
• A reliable measure must be valid.

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