WGU C784-Statistics Mod 4 Exam Questions & Answers. Complete 2024 Revised Update.

WEST GOVERNORS UNIVERSITY C784 - Applied Healthcare Statistics WGU C784-Statistics Mod 4 Exam Questions & Answers. Complete 2024 Revised Update. 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. value into a stem and a leaf. The leaf is the right most digit, and the stem consists of all of the digits to the left of the leaf. Note: Represent each number that is in the ones place from the list of numbers. By doing this the stems will consist of ones, twos, threes, and fours. Next list the leafs by taking the digit to the right and writing it within the coloumn/stem that matches the ones place holder of the number. Example 31 the ones place/ stem is "3" the Leaf which is to the right of the number is "1". After listing all stems and leafs. Re-arrange them in increasing order. If the list of numbers is long or big you can split the stem and leaf into two sets. Ex. the first stem set of 1 will list any leafs 1-5 while the second stem leaf set can list any leafs 6-9. See thirs graph for illustration What 4 analysis are needed to describe a distribution - Correct Answer- 1. The shape of the graphical display 2. The center and spread of the data 3. The maximum and minimum values 4. Any values that could be outliers What are the Numerical Measures of Center - Correct Answer- Mean: "Average" Median: "Middle" Mode: "Most frequently occurring" Find the Mean - Correct Answer- Add up all the values and divide by the number of values Find the Median - Correct Answer- Put the data in order and the median is the middle value. When the data set is an even number the median is an average of the middle values that is divided by 2. Find the Mode - Correct Answer- It's the Number that appears most often. If a data set has two modes then we refer to the data set as BiModal. If more then 2 then we would call it MultiModal Identifying the Range, Interquartile Range, and the Standard Deviation allows us to data set Define the Range - Correct Answer- How to identify the quartiles of a data set - Correct Answer- - Correct Answer- difference; IQR What are the steps to using the IQR to find Outliers - Correct Answer- The IQR represents how spread out the middle of half of the data is. If we multiply that by 1.5 that would be 1.5 x the IQR. We will use this as our measurement to measure up from Q3. (Q3+ ( 1.5 x IQR) and down from Q1