DJM Topic 4 - Visualizing Distribution

Question 1

Distribution

Answer 1

Examining sets of quantitative values to see how the values are distributed from lowest to highest

Question 2

mean, median, and mode

Answer 2

Describe how parts of the data are distributed, but do not show the full distribution

Question 3

Spread

Answer 3

The lowest value, highest value, and distance between them in a distribution

Question 4

Center

Answer 4

An estimate of the middle set of values or the most typical value in a distribution

Question 5

Shape

Answer 5

Where the values are located in a distribution, such as curved or flat, upward or downward, single or multiple peaked, symmetrical or skewed, concentrations, and gaps

Question 6

Outliers

Answer 6

Values that are unusually high or low compared to the rest of the distribution

Question 7

3-value summary

Answer 7

minimum, median, maximum

Question 8

5-value summary

Answer 8

minimum, 25th percentile (Q1), median, 75th percentile (Q3), maximum

Question 9

Distribution patterns

Answer 9

The shape, concentrations, gaps, and outliers in a distribution

Question 10

Shape patterns

Answer 10

Curved or flat, upward or downward, single or multiple peaked, symmetrical or skewed

Question 11

Single distribution display examples

Answer 11

1) Histogram
2) Frequency Polygons
3) Strip Plots
4) Stem-and-Leaf Plots

Question 12

Multiple distribution display examples

Answer 12

1) Box plots
2) Multiple strip plots
3) Distribution deviation graphs

Question 13

Distribution Analysis Best Practices

Answer 13

1) Keeping intervals consistent
2) Selecting interval size
3) Using resistant measures (Median & Percentiles instead of Mean & Standard Deviation)

Question 14

Bar Chart vs Histogram

Answer 14

Histograms display distributions of variables and plot binned quantitative data, while bar charts are used for comparing variables and plot categorical data. Unlike in bar charts, bars cannot be reordered in histograms.