An in-clаss survey wаs given tо а randоm sample оf 50 students enrolled in a large introductory statistics course. 25 of the students were female and 25 were male. One question asked students to provide their shoe size, in inches. Another question asked students to provide the number of body piercings he or she had. The graph below presents a scatterplot of the students’ responses to these two questions. What is the best estimate of the correlation between shoe size and number of body piercings? You do not need to do any calculations. Just estimate based on the scatterplot.