Mathlinks 8 Answer Key Form

Name Period 8-10 STUDENT PACKET MATHLINKS GRADE 8 BIVARIATE DATA Categorical Data Construct two-way frequency and relative frequency tables using bivariate data. Interpret two-way frequency tables. Explore the effect that potential outliers have on data patterns. Distinguish between linear and nonlinear association. Skill Builders Vocabulary and Review MathLinks Grade 8 Student Packet 10 WORD BANK Word Definition Example or Picture association categorical data frequency table line of best fit measurement relative two-way table 10. Conduct a survey. Numerical Data Construct scatter plots. Describe various patterns of association in bivariate data* Interpret and draw conclusions from scatter plots. Lines of Best Fit Draw lines of best fit and estimate their equations. Interpret the slope and y-intercept of linear models in context of the data* Use linear models to make predictions. 1 Categorical Data CATEGORICAL DATA Summary Ready Goals Set We will use two-way tables to display the frequencies and relative frequencies of We will draw conclusions about possible relative frequency tables using bivariate Warmup Go Below are some measurement data about Ms. Robertson s 8th grade math class. Number of boys. Number of girls Number of students who ate breakfast this morning. Use the data to answer the questions below. 1. How many students are in the class n 2. What percent of the students in the class are boys Why must the sum of these percents equal 100 Why is it possible that the sum of these percents doesn t equal 100 WHAT IS CATEGORICAL DATA ranges of measurements or other attributes of the data* Generally there are only finitely many categories. 1. For each topic below list categories for organizing collected data* Then create a possible survey question that you could use to collect data with each category. Topic Possible Categories Possible Survey Question s Example Hair color Black brown blonde red other What color is your hair OR Do you have dark hair Music Art Fruit Ecosystems 2. If you were reading a table that had categorical data labeled swimming football and basketball what might be the larger topic that is being explored 3. Choose a topic that you could collect data about and list possible categories related to that topic* Topic Categories CATEGORICAL QUESTIONS Categorical survey questions are used to collect categorical data* These questions usually have word responses. For example Do you own at least one dog is a categorical question because the answer is either yes or no. Numerical survey questions are used to collect numerical data* Numerical data sometimes come from counting. It can sometimes come from measurements. These questions usually have number responses. For example How many dogs do you own is a numerical question State whether each question in the table below is a categorical or numerical survey question* Question Numerical N 1. Are you male or female 2. What is your favorite color 3. How many dress shirts do you own 4. Are you an only child 5.