Ruben wants to determine if listening to different types of music will affect a persons pulse his hypothesis states that if people listen to music at their possible increase more than if they listen to other types of sound such as white noise Rubin test his mother sister and cousin he takes each participants pulse before during and after listening to 30 minutes of music and then repeats the process with 30 minutes of white noise from the data collected he concludes that music raises a persons pulse the most. which characteristic of science is missing from this experiment ??