A researcher wants to determine if exposure to subliminal (unconscious) images depicting older adults XXXXXXXXXXyears old) will influence the time it takes pedestrians to get across a busy...

A researcher wants to determine if exposure to subliminal (unconscious) images depicting older adults (80-95 years old) will influence the time it takes pedestrians to get across a busy intersection using a crosswalk. A random sample of sixty pedestrians are exposed to a set of subliminally presented positive images using a special electronic traffic signal before the signal prompts them to cross. From previous studies (using the same crosswalk and intersection), the experimenter knows that when no subliminal images are presented, the average time it takes the city’s population to cross is 30.5 seconds, with a standard deviation = 5.5 seconds.

Extracted text: 3) A researcher wants to determine if exposure to subliminal (unconscious) images depicting older adults (80-95 years old) will influence the time it takes pedestrians to get across a busy intersection using a crosswalk. A random sample of sixty pedestrians are exposed to a set of subliminally presented positive images using a special electronic traffic signal before the signal prompts them to cross. From previous studies (using the same crosswalk and intersection), the experimenter knows that when no subliminal images are presented, the average time it takes the city's population to cross is 30.5 seconds, with a standard deviation = 5.5 seconds. 4) Researchers are testing the hypothesis that the content of distracting speech will affect driving performance. Their subjects completed a driving test in a simulator while they listen to distracting speech with three different types of content: an audiobook mystery (AM), a conversation between friends (CF), or a Political Speech (PS). Eight participants are randomly assigned to one of each of the three conditions and the researchers record the number of errors made in the driving simulation. 5) According to the Center for Disease Control, 60.9% of college students nationwide are fully vaccinated for COVID. You wish to determine if the national average describes the mean vaccination rate for college students in San Francisco. You recruit a random sample of 48 college students in San Francisco to test the research question.