{"type":"video","version":"1.0","html":"<iframe src=\"https://www.loom.com/embed/18f07edbfdaa4a62b4036db8b52ebf89\" frameborder=\"0\" width=\"962\" height=\"721\" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe>","height":721,"width":962,"provider_name":"Loom","provider_url":"https://www.loom.com","thumbnail_height":721,"thumbnail_width":962,"thumbnail_url":"https://cdn.loom.com/sessions/thumbnails/18f07edbfdaa4a62b4036db8b52ebf89-00001.jpg","duration":110,"title":"SAT official #8_S4_Q28","description":"p:  The 22 students in a health class conducted an experiment in which they each recorded their pulse rates, in beats per minute, before and after completing a light exercise routine. The dot plots below display the results. Let s1 and r1 be the standard deviation and range, respectively, of the data before exercise, and let s2 and r2 be the standard deviation and range, respectively, of the data after exercise. Which of the following is true? \na: s1 = s2 and r1 = r2 ;\n s1  s2 and r1 > r2 ;\n s1 not s2 and r1 = r2 ;"}