developmental psychologist travels toJamaica to study the effects of maternal THC use on cognitive behavioral outcomes of infants. Moms are placed into groups depending on their THC use: habitual, moderate, no use. in order to assess the the three levels of THC use, the program selects a random sample of 600 moms who responded to the online survey and classified them according to the THC use they indicated. Five years later, the study finds that 8% of those who indicated habitual THC use showed developmental delays. 10% of those who indicated moderate THC use showed developmental delays and 12% of those who indicated no THC use showed developmental delays. Question 1 of8 Which of the following is the correct design of this study? A randomized experiment A randomized response study A randomized obsewational study A blind observational study A randomized experiment OOOOOO An observational study Question 2 of 8 In this case, can we conclude that any association that is found in the sample was due to causation? In other words, can we conclude that maternal THC use is the cause for whether or not the sampled children displayed developmental delays? No, because association never implies causation No, since the individuals chose themselves which THC condition they would he in they were not randomlyassignedv Yes, since the individuals were randomly assigned to one of the the three THC treatments Yes, because ofthe relatively large sample size (n=600]. OOOOO Yes, since the sample was random A controversial but promising new cancer treatment uses the HIV virus to attack Leukemia cells. To investigate the claimed effect of an injection containing a modied version of the HIV virus, a health researcher obtains 300 adults with late stage liver cancer volunteer for the study after receiving the prognosis that no FDA approved treatment would be effective. Each of the subjects is then randomly assigned to get one series of injections from among two possible: Either the 'modied Hleirus' or else a 'fake HIV virus' an injection that looks the same but does not contain any modified HIV. The subjects did not know which ofthe two treatments they were assigned to be treated with. After a series of treatments, each subject is checked to see if the cancer has gone into remission, stayed the same or spread. The number of cancer affected cells is recorded before and after treatment. Question 3 of 8 Which of the following best describes the design of this study? An experiment A blind observational study An observational study A blind survey A blind experiment 000000 A survey \fA study explored the relationship between spelling bee performance and vocabulary size. The researchers followed a group of children who are 'expert spellers' and a group of children who are 'novice spellers' and found a largervocabulary among those who are 'expert spellers'. After the researchers collected more data. they discovered that the time studying words from the dictionary was significantly higher, on average, in the 'expert spellers' group. Which of the following is true? 0 Study time is a lurking variable 0 Study time is an explanatory variable 0 Study time is a response variable 0 None ofthe above Question 6 of 8 A study was conducted to explore the effect of ethnicity (caucasian or other ethnic groups) on the getting hired. An identicaljob application was shown to a random sample of 120 tech companies in Silicon Valley. The companies were randomly assigned to review an application with a white sounding name or an application with a black sounding name. The average number ofcallbacks for an onsite interview with the white sounding name was higher than the average number of callbacks for an onsite interview with the black sounding name. Complete the the following sentence: This Choose... ' is Choose... ' and Choose... ' acontrol group. Question 7 of 8 When designing and writing questions for a survey, which of the following are issues that you need to pay attention to? 0 Random Sample 0 Control Group 0 Sensitive questions 0 All ofthe above. 0 None ofthe above Which ofthe following would be the best question to include in a poll in order to assess the opinions of US. adults about unprotected sex? 0 Given the da ngers of contracting potentially deadly sexually transmitted diseases from unprotected sex. which of the following best describes your View about unprotected sex? 0 Strongly Favor . Favor Op pose Strongly Oppose Not Sure 0 Which of the following best describes yourview about u nprotected sex? Strongly Favor Favor Op pose Strongly Oppose Not Sure 0 Given the pleasurabilit)r ofunprotected sexr which of the following best describes your View about unprotected sex? Strongly Favor Favor Op pose Strongly Oppose Not Sure