WGU C784-Statistics Module 4 Practice Concepts with Complete Solutions.

Define Mode Correct Answer The value that occurs most often in a data set The Mean of a data set represents the? Correct Answer Average Median of a data set Correct Answer The middle value of the data set What are the two types of variables Correct Answer 1) Quantitative Variable 2) Categorical Variable Quantitative variable Correct Answer Quantitative variable - a variable that takes a numerical value that can be counted or measured. Examples: height, weight, age, cholesterol level, exam scores Categorical variable Correct Answer Categorical variable - a variable that is not measured; it is a "category" or a label; it places the individual in a certain group. Examples: gender, months of the year, zip codes List Two Graphical Displays for Categorical Data Correct Answer 1) Pie Charts 2) Bar Charts ___________________ - best when we want to display different parts of a whole Correct Answer Pie Charts. _______________________ - best to display counts or frequencies for the categories Correct Answer Bar Charts. List the 4 different Graphical Displays for Quantitative Data Correct Answer Dot Plot - Best to display the distribution of data, particularly clusters, gaps, and outliers. Most useful for smaller data sets. Stem Plot (or Stem and Leaf Plot) - Best to display the distribution or shape of data according to place values. Keeps information about individual data points. Box Plot - Best to display the center, spread, and outliers of a given data set. Histogram - Best to display the distribution (shape and spread) of quantitative data. Works well with large data sets.