WGU C955 APPLIED PROBABILITY AND STATISTICS FINAL LEARNING WORKBOOK 2026 DESCRIPTIVE AND INFERENTIAL STATISTICS

WGU C955 APPLIED PROBABILITY AND
STATISTICS FINAL LEARNING WORKBOOK
2026 DESCRIPTIVE AND INFERENTIAL
STATISTICS

◉ Histogram.
Answer: A graphical representation -- bars, measuring the frequency
within each interval


◉ Skewed right.
Answer: Not a symmetric distribution, the tail is on the right, i.e.
extra stuff on the right


◉ Measures of center.
Answer: Median, the mean (and mode)


◉ Measures of spread.
Answer: Range, IQR & standard deviation


◉ Standard Deviation Rule.
Answer: 68% of the data are within 1 standard deviation, 95% are
within 2, 99.7 are within 3 standard deviations from the mean.

, ◉ For skewed data, use these for center and spread.
Answer: In this situation, we use median (for center) & IQR (for
spread)


◉ Explanatory variable.
Answer: In a study, what we think is the "cause"


◉ Response variable.
Answer: In a study, what we think is the "effect"


◉ Scatter plot.
Answer: A graphical representation of Q -> Q


◉ Two way table.
Answer: A graphical representation of C -> C


◉ Side-by side box.
Answer: A graphical representation of C -> Q


◉ Linear relationship.
Answer: "shaped like a line"