Read the following on attendance and grades , and answer the questions A study conducted at Manatee Community College revealed that students who attended class 95 to 100 % of the time usually received an A in the class . Students who attended class 30 to 90 % of the time usually received a B or C in the class . Students who attended class less than 80 % of the time usually received a D or an F or eventually withdrew from the class Based on this information , attendance and grades are related . The more you attend class , the more likely you will receive a higher grade . If you improve your attendance , your grades will probably improve . Many factors affect your grade in a course . One factor that you have considerable control over is attendance. You can increase your opportunities for learning by attending class more often . 1. What are the variables under study ? 2. What are the data in the study ? 3. Are descriptive , inferential , or both types of statistics used ? 4. What is the population under study ? 5. Was a sample collected? If so, from where? 6. From the information given , comment on the relationship between the variables ACTIVITY 2: SAFE TRAVEL Read the following information about the transportation industry and answer the questions Transportation Safety The chart shows the number of job-related injuries for each of the transportation industries for 1998 1. What are the variables under study ? 2. Categorize each variable as quantitative or qualitative 3. Categorize each quantitative variable as discrete or continuous 4. Identify the level of measurement for each variable 5. The railroad is shown as the safest transportation industry. Does that mean railroads have fewer accidents than the other industries ? Explain 6. What factors other than safety influence a person's choice of transportation ? 7. From the information given , comment on the relationship between the variables