Unit 2: Descriptive Statistics 6B Simple Quantitative Discrete Data, 6C Grouped Quantitative Discrete Data Unit 2: Descriptive Statistics 6B, 6C 2/17/2019 7:22 PM

Organizing and Depicting Data frequency tables help to organize data if scores are repeated tally marks: grouped in sets of five frequency: number of times the value occurs (state the total) relative frequency: frequency divided by the total number of scores 6B, 6C 2/17/2019 7:22 PM

Describing Data after depicting data, three common interpretations of the distribution, or pattern of variation in the data, are: Interpretations can sometimes be made using a frequency table, but for which depictions can these interpretations be used? column graphs and histograms Copy 6B, 6C 2/17/2019 7:22 PM

Pie Charts What are Paxon students’ favorite days of the week? What is the population? Organize our class period’s responses into a frequency table. Use a relative frequency column to determine central angle measures. Construct a pie chart for the data. What form of sampling took place? What descriptive statistics or interpretations can you make? What are your able to infer about the population? 6B, 6C 2/17/2019 7:22 PM

Grouped vs. Ungrouped When would you want to group your quantitative discrete data? It is statistically meaningful to group your data into class intervals when most datum have very low frequencies. Would your interpretation of the data change? instead of a mode, you would now have a modal class would not be able to, from either the frequency table or visual depiction alone, determine specific data values 6B, 6C 2/17/2019 7:22 PM

Guided Practice p. 162: read TOK box p. 165: 2,4 p. 166: 1,2 Read and follow all instructions. List the page and problem numbers alongside your work and answers in your notes. Use the back of the book to check your answers. Copy 6B, 6C 2/17/2019 7:22 PM