Determine whether the value is a parameter or statistic:

a) Two thirds of the class are freshman. Select an answer Parameter Statistic

b) In a weight loss research study the sample of 50 men lost an average of 2.5 pounds. Select an answer Parameter Statistic

c) A hospital recently surveyed all their patients and found that 85% were satisfied with their level of care. Select an answer Parameter Statistic

d) Facebook tested the mean amount of time its users use the site each day, and they found the mean amount of time all users use the site is 80 minutes each day. Select an answer Parameter Statistic