You have chosen a sample of 25 supermarkets out of the 684 you have responsibility for. These 25 have been inspected, and the number of violations of company policy has been recorded. For each of the following quantities, state whether it is a statistic or a parameter.
a.* The average number of violations among the 25 supermarkets you inspected.
b.* The mean number of violations you would have recorded had you inspected all 684 supermarkets you are responsible for.
c. The variability from one supermarket to another in the population.
d. The variability from one supermarket to another, as measured by the standard deviation you computed.
e. The standard deviation of your sample average.
f. The standard error of your sample average.