1.) suppose the birthweight of newborn babies has a mean of 3.3 kg and a standard deviation of 0.55 kg, then what percentage of newborns have birthweight between 2.75 kg and 3.85 kg?
2.) suppose the average female foot size follows a standard deviation where the mean is 8.076 and the standard deviation is 1.468. the middle 68% of foot sizes is between which two sizes?
3.) suppose blood pressure follows a standard deviation where the mean is 85 mm and the standard deviation is 20 mm. what percentages of blood pressures are below 125 mm?
