The Journal of Social Psychology reported on a study conducted by researchers from the University of South Brittany in France investigating people's behavior under two different conditions: the pleasing smell of fresh bread outside a bakery compared to the neutral smell outside a clothing store. The following is an abstract describing the study: "The participants were 200 men and 200 women (between the ages of approximately 20 and 50) chosen at random while they were walking in a large shopping mall. The participant was tested while walking near areas containing pleasant ambient odors (e.g., bakeries, pastries) or not (e.g., clothing stores). Four young women (median = 20.3 years) and four young men (median = 21.3 years) served as confederates in this study. They were dressed in clothing typically worn by people of this age (jeans/T-shirt/boat shoes). The confederate chose a participant walking in his/her direction while standing in front of a store apparently looking for something in his/her bag. The confederate was carefully instructed to approach men and women walking alone, apparently aged from 20 to 50, and to avoid children, adolescent, and elderly people. The confederate was also instructed to avoid people who stopped near a store. Once a participant was identified, the confederate began walking in the same direction as the participant about three meters ahead. The confederate held a handbag and accidentally lost a glove. The confederate continued, apparently not aware of his/her loss. Two observers placed approximately 50 meters ahead noted the reaction of the passer-by, his/her gender, and estimated, approximately, his/her age. Responses were recorded if the subject warned the confederate within 10 seconds after losing the object. If not, the confederate acted as if he/she was searching for something in his/her hand-bag, looked around in surprise, and returned to pick up the object without looking at the participant." Assume that when the confederate saw a person who fit the qualifications, a coin was flipped. If it came up heads, the subject was picked to be in the study, if tails, they were skipped. The study resulted in 154 of 200 people outside a bakery telling the confederate they lost something, whereas outside the clothing store, 105 of 200 people told the confederate they lost something. References: 1 Nicolas Guéguen, 2012. The Sweet Smell of ... Implicit Helping: Effects of Pleasant Ambient Fragrance on Spontaneous Help in Shopping Malls. Journal of Social Psychology 152:4, 397- 400 What is the explanatory variable in this study? Type of ambient scent (bakery, clothing store) Whether or not the participant warned the confederate within 10 seconds Age of the participate Gender of the participant Save Answer Q1.2 Response variable 1 Point What is the response variable in this study? Type of ambient scent (bakery, clothing store) Whether or not the participant warned the confederate within 10 seconds O Age of the participate Gender of the participant Save Answer Q1.3 Type of plot 1 Point What type of plot is most appropriate to summarize these data? O Parallel boxplots O Scatterplot O Relative frequency bar plot O Segmented bar plot Q1.4 Summary statistics 3 Points Let B represent the bakery group and C represent the control group. Calculate each of the following values. Round each answer to three decimal places. PB = Enter your answer here Pc = Enter your answer here PB - pc = Enter your answer here Save Answer Q1.5 Standard error 2 Points Calculate the standard error for the difference in sample proportions, not assuming a null hypothesis is true. Be sure to show your work and round your answer to four decimal places. Enter your answer here Save Answer