Section 3.1 Learning Check||Please enter your Full Name:|Your Email Address:|Your ID Number or Password:|A researcher wishes to find out whether the population of students at a university preferes Netscape or Internet Explorer as a browser. A random sample of students is selected, and each one is asked to try Netscape and then Internet Explorer, or vice versa (with the order determined at random). They indicate which browser they prefer. This is an example of # an expreriment. %% an observational study, not an experiment. %% stratified sampling design. %% block design. %%|John does not wear a seat belt when he drives. He claims that his uncle has a friend who knows of a case in which someone was trapped in a burning car and died when their seat belt failed to open. John's sister also has a friend who knows of a similar case. <br> John's decision not to wear a seat belt is based on # anectodal evidence. %% an observational study based on available data. %% an observational study based on a sample survey. %% an experiment. %%|A baseball enthusiast believes pitchers who strike out a lot of batters also walk a lot of batters. She reached this conclusion by going to the library and examining the records of all major league pitchers between 1990 and 1995. This study is an example of # anectodal evidence. %% an observational study based on available data. %% an observational study based on a sample survey. %% an experiment. %%