In a health club, research shows that on average, patrons spend an average of 46.2 minutes on the treadmill, with a standard deviation of 4.8 minutes. it is assumed that this is a normally distributed variable. find the probability that randomly selected individual would spent between 30 and 40 minutes on the treadmill. homework : 4va. calculating normal probabilities (links to an external site.)links to an external site. (2: 18) 4da. description of normal distribution, area, and probabilities, definition of unusual events (links to an external site.)links to an external site.(docx) 0.10 -0.10 0.80 0.90