If the principal of your school wanted to know the average time students spent studying each week , shelhe should use a sample. A . True B. False If a health insurance company needed to audit the amount and type of prescriptions all the people they insure are taking , what would be the best method to collect this data? A . census B. Survey C, controlled experiment D. observation 7 which task is not a component of an observational study?. A. The researcher decides who will make up the Sample B. The researcher analyzes the data received from the Sample C. The researcher gathers data from the sample, using surveys or measurements D. The researcher divides the sample into two groups, with one group acting as a control group A doctor wants to test the effectiveness of a new drug on her patients. She separates her Sample of patients into two groups and administers the drug to only one group. She then compares the results. which type of sturdy beth describes this situation? A. Census B. Survey 9) which sampling method would result C. observation in the most unbiased sample to gather D. controlled experiment data regarding cell phone carrier preference in your town? A. Poll residents as they leave the grocery store B. Poll residents as they leave the Mrs store C. call residents on & saturday morning D. Poll residents in your neighborhood going door to door on a sunday afternoon