Answer: B
Step-by-step explanation: To obtain the mean for a general set of data, the formula used is;
= (sum of all the data set)/ (number of data set)
The number of data set for the two samples is 10
For the mean for the security company;
= (1.6+1.8+1.6+1.8+1.7+1.2+1.1+1.2+1.2+1.5)/10 = 14.7/10
= $ 1.47million
For the mean for the other companies;
= (1.5+2.1+1.9+2.2+1.9+1.7+2.1+2.2+2.2+1.8)/10 =19.6/10
= $ 1.96 million
The data from the samples have to be rearranged before the median can be obtained;
For the Security Company;
1.1 1.2 1.2 1.2 1.5 1.6 1.6 1.7 1.8 1.8
There are two data sets in the middle, therefore the median will be obtained by finding the average of the data sets;
= (1.5+1.6)/2 =$ 1.55 million
For the other companies;
1.5 1.7 1.8 1.9 1.9 2.1 2.1 2.2 2.2 2.2
There are two data sets in the middle, therefore the median will be obtained by finding the average of the data sets;
= (1.9+2.1)/2 = $ 2.00 million
Therefore, the answer is B
