7) 72, 43, 15, 66, 32, 72, 52, 19, 28, 81\nmean : ______ median : ______\nmode : ______ range : ______

Explanation:

Step1: Calculate the mean

The mean is the sum of all numbers divided by the count. The sum of 72 + 43+15 + 66+32+72+52+19+28+81 = 480. There are 10 numbers. So the mean is $\frac{480}{10}=48$.

Step2: Calculate the median

First, arrange the numbers in ascending - order: 15, 19, 28, 32, 43, 52, 66, 72, 72, 81. Since there are 10 (an even number) values, the median is the average of the 5th and 6th numbers. So the median is $\frac{43 + 52}{2}=\frac{95}{2}=47.5$.

Step3: Calculate the mode

The mode is the number that appears most frequently. Here, 72 appears twice and other numbers appear only once, so the mode is 72.

Step4: Calculate the range

The range is the difference between the largest and the smallest number. The largest number is 81 and the smallest is 15. So the range is 81 - 15=66.

Answer:

Mean : 48 Median : 47.5 Mode : 72 Range : 66