Straighterline Introduction to Statistics Top Compiled Questions and Correct Answers 2024 Update

Four steps in the process of statistics - 1. Producing Data 2. Exploratory Data Analysis 3. Probability 4. Inference Categorical variable - places individuals into one of several groups Two types: nominal and ordinal Quantitative Variable - represents a measurement or a count Two types: Interval and ratio Nominal Variable - categorical variables where there is no natural order among the categories Ordinal variable - categorical variables where there is natural order among the categories Interval Variable - a measurement or count for which it makes sense to talk about the difference between values, but it does not make sense to talk about the ratio between values; 0 does not represent the absence of quanitity Ratio Variable - quantitative variables for which it makes sense to talk about the difference between values AND the ratio between values; 0 represents the absence of quantity What type of variable?: eye color - nominal What type of variable?: socioeconomic status with categories low, med, high - Ordinal What type of variable?: Temperature - Interval What type of variable?: Income - Ratio Visual display and numerical summary for a single categorical variable - pie chart or bar chart and category percentages Visual display and numerical summary for a single quantitative variable - histogram or stemplot and descriptive statistics Visual display and numerical summary for C->C - Two way table and conditional percentages Visual display and numerical summary for C->Q - Side by side box plots and descriptive statistics Visual display and numerical summary for Q->Q - Scatterplot and correlation coefficient (