Discussion
(c) Write a paragraph (perhaps after you complete the rest of the lab, but a paragraph, not a disjointed list of facts) discussing and comparing the distributions of the number letters memorized between the two groups, referring to your graphical and numerical summaries.
- Make sure you discuss each of shape, center, and spread, and if appropriate, outliers or any other unusual observations or interesting features to the distribution.
[Extra Credit: There is an additional feature to the JFK dotplot that you could notice and even offer an explanation for why this feature occurs in this particular study. Hint: Try filling in some of the missing scale values...] - Your statements of center and spread should be backed up with numerical support (e.g., mean or median (Topic 8); standard deviation or IQR from Topic 9).
- Also report the sample sizes.
- Remember to relate all of your comments to the context and to use appropriate measurement units.
- Your comments should touch on:
- Does one group have a tendency for remembering more letters? (How are you deciding?)
- Does one group have a tendency for more or less consistency in scores? (How are you deciding?)
- Does the difference in the centers of the two distributions of number of letters recalled appear noteworthy (i.e., large enough for you to care, do you think it will be statistically significant)?
- Do the group means differ in the direction predicted by the psychology theory of chunking?
