The age of people entering a super store
Likely to be normal - a sampling of the general population
The heights of people entering a super store
Likely to be normal - a sampling of the general population
The number of 8 oz glasses of milk in 1 gallon
Not normal - this is always 128/8 = 16 a fixed constant
The gallons of milk sold at the super store in one week
Not likely to be normal - Likely to be close to uniform from day to day