## Elementary Statistics (12th Edition)

The mean can be counted by summing all the data and dividing it by the number of data: $\frac{0.56+0.75+0.1+0.95+1.25+0.54+0.88}{7}=0.719$, the mean is 0.719. The mode is the data occuring the most times but here all data occurs one time, therefore there is no mode. The median is the average of the 1 or 2 (here 1) middle data: 0.75/1=0.75, the median is 0.75. The midrange is the average of the highest and the lowest data: (1.25+0.1)/2=0.675, the midrange is 0.675. Fairway's mercury rate is the lowest, therefore they sell the healthiest tuna. They probably do not get the tuna from the same supplier because the mercury values really differ.