C784 Statistics FULL COURSE REVIEW questions and answers well illustrated.

C784 Statistics FULL COURSE REVIEW questions and answers well illustrated. Lurking Variable - correct answers.Associated with the explanatory and the response variables that is not directly being studied. Simpson's Paradox - correct answers.Occurs when a trend or result that appears in groups of data disappears when we combine the data. Regression Analysis - correct answers.A process for estimating and analyzing the relationship between variables. Least-Squares Regression Line - correct answers.AKA the line of best fit. y = mx + b "rise over run" Interpolation - correct answers.Using existing data along with the Least-Squares Regression Line to make a prediction. Extrapolation - correct answers.Estimation by projecting OUTSIDE known data points. p-value - correct probability that a result occurred by chance Significance Levels in Hypothesis Testing - correct answers.Statistically Significant: If a measured p-value is less than the significance level. NOT Statistically Significant: If a measured p-value is MORE than the significance level. Empirical Rule - correct answers.68 - 95 - 99.7 68% is w/in 1 standard deviation of the mean 95% is w/in 1 standard deviation of the mean 99.7% is w/in 1 standard deviation of the mean Used for Categorical (Qual) Data - correct answers.Bar Chart Pie Chart Mean - correct answers.Average - adding series then dividing by the total number in that series Center & Spread Measures - correct answers.SYMMETRIC - Mean (center) / Standard Deviation (spread) SKEWED - Median (center) / IQR (spread) CATEGORICAL - Mode (center) / no spread What is the difference between a bar chart and a histogram? - correct answers.BAR CHART - Categorical data distributed over groups of categories HISTOGRAM - Quantitative data distributed over various intervals Outlier Formula - correct answers.1.5 x IQR above Q3 or below Q1 Graphical Displays for Quantitative Variables - correct answers.HISTOGRAMS - large data sets STEM PLOTS - keeps individual data points DOT PLOTS - smaller data sets BOX PLOTS - center, spread and 5 number summary SCATTER PLOTS - x,y axis 5 Number Summary - correct answers.Min - Q1 - Median - Q3 - Max Graphical Displays and Corresponding Numerical Analysis Tools for Examining Data Relationships - correct answers.C > C - Two-way Frequency Tables (aka Contingency Table) use conditional percentages and relative frequencies C > Q - Side-by-Side Boxplots use 5 number summaries Q > Q - Scatterplots use correlation coefficients InterQuartile Range (IQR) - correct answers.Q3-Q1 Standard Deviation - correct answers.Average distance each data point is from the mean 3 Types of Percentages on a Two-Way Frequency Table - correct answers.OVERALL% - (aka Relative Frequencies) When all of the counts are divided by the overall total