WGU C955 Exam Questions & Answers(graded A+)

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