WGU C955 Exam Questions and Answers

WGU C955 Exam Questions and
Answers

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

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.

median (for center) & IQR (for spread) - ANSWER-skewed data uses these for center
and spread

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

Interpolation - ANSWER-Making predictions *within* the range of your data. This is
usually accurate.

Extrapolation - ANSWER-Making predictions *outside* of the range of your data. This is
generally a bad idea.

Simpson's Paradox - ANSWER-When split up, each data set can have a pattern which
goes away when all the data is combined.

Prospective study - ANSWER-Is a study that's done over time to find results / A study
watching for outcomes during the study period

Unbalanced response - ANSWER-Giving more options that are negative than positive
options (or vice versa) which biases the responses towards the more common option