The base of the ladder should be placed so that it is one foot away from the building for every four feet of hight to where the ladder rests against the building. This is known as the 4 to 1 rule.
In order to obtain a standard deviation of 0, all members of the data set should be equal. This means that each of the 100 members in the data set is equal to 50 (the mean value).
Answer: The smallest observation in the set is 50.
