Question

Most people are right-handed, and even the right eye is dominant for most people. Molecular biologists have suggested that late-stage human embryos tend to turn their heads to the right. In a study reported in Nature (2003), German bio-psychologist OnurGüntürkün conjectured that this tendency to turn to the right manifests itself in other ways as well, so he studied kissing couples to see which side they tended to lean their heads while kissing. He and his researchers observed kissing couples in public places such as airports, train stations, beaches, and parks. They were careful not to include couples who were holding objects such as luggage that might have affected which direction they turned. For each kissing couple observed, the researchers noted whether the couple learned their heads to the right or to the left. They observed 124 couples, ages 13–70 years. Suppose that we want to use the data from this study to investigate whether kissing couples tend to lean their heads right more often than would happen by random chance.​

Answer 1

Answer: If this research is conducted between ages 13-70 years by random chance, the research result will be bias, because the tendency or probability of getting age 13-17 years kissing in public will be very low, because this age are still refered to as minor and may not have the boldness to kiss in public places. Also the tendency of getting age 50-70 years kissing in public places will be very low, because this age has grown old and the tendency or probability of their romantic life to be active at kissing in public places is very low. From age 18-40 years will be very much to seen if not all, and from age 41-49 will be a bit more. The conclusion of the research may be only for age 18-49 as it will be more easier to see this age kiss at public places. So for the researcher to use a research that more observation is see in age 18-49 years to draw conclusion for age 13-70 years, that's means he's conclusion will be bias because non or less observation is likely to be seen in age 13-17 and age 50-70 year.