A recent study found that the weights of adult green sea urchins are normally distributed with mean 52.0g and standard deviation 17.2g. Let x denote weight of adult green sea urchins. a) Sketch the...

A recent study found that the weights of adult green sea urchins are normally distributed with mean 52.0g and standard deviation 17.2g.  Let x denote weight of adult green sea urchins.

1. a) Sketch the distribution of the variable x.


2. b) Obtain the standardized version, z, of x.


3. c) Identify and sketch the distribution of z.


4. d) The percentage of adult green sea urchins with weights between 50g and 60g is equal to the area under the standard normal curve between ______ and ______.