The body weights of a group of women who joined a slimming program are standardized to a Normal model with a mean of 100kg and a standard deviation of 20kg.

a) Draw the model for these weights. Clearly label it, showing what the 68–95–99.7 Rule predicts about the weights.

b) In what interval would you expect the central 95% of weights to be found?

c) About what percent of women should have weights above 120kg?

d) About what percent of women should have weights between 60kg and 80kg?

e) About what percent of women should have weights above 140kg?