WGU C955 Exam Questions & Answers 100% Solved
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
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