6. For all registered vehicles in Monroe County, the standard deviation of the ages of the vehicles is 3 years. Is the standard deviation of the ages of the vehicles a parameter or a statistic? a. parameter b. statistic Identify the type of sample described. 7. You want to determine whether students like the new healthy options for the school lunch. You place questionnaires in lockers and use the ones returned to you. a. convenience b. self-selected C. stratified d. systematic e. cluster 8. You want to determine whether students like the new healthy options for the school lunch. You ask students in your homeroom. a. stratified D. convenience c. self-selected d. cluster e. systematic You want to determine whether your neighbors think the speed limit should be lowered in your neighborhood. You randomly select a neighbor from each street in your neighborhood. a. self-selected . convenience C. systematic d. stratified e. cluster 9. 10. You want to determine whether your neighbors think the speed limit should be lowered in your neighborhood. You randomly select one block in the neighborhood and ask all the neighbors who live on that block a. self-selected b. cluster C. convenience d. systematic e. stratified