STA 261 Study Guide - Final Guide: Standard Deviation, Contingency Table, Design Patterns
Document Summary
Descriptive vs. inferential statistics: descriptive- summarizing the data, mean, median, standard deviation, Graphical displays: inferential- drawing conclusions about a population based on a sample, confidence intervals, hypothesis tests. Statistical question: a question that can be answered by collecting data- can"t have an answer that is just based on a single number. Sample vs. population: sample- a subset, or part of the entire group of individuals of interest, population- entire group of individuals or items of interest. Parameter vs. statistic: parameter- a value that is computed from the whole population (a fixed value, statistic- a value that is computed from the sample (a variable value- changes from sample to sample) Doesn"t make sense to add, subtract, or average the values: quantitative: Adding, subtracting, or averaging the values has meaning. Possible to change into qualitative data when looking at groups. Discrete- finite or countable (# rooms), isolated points on a number line, associated with counting.
