Question

chau is recording the percentages he earned on each quiz in his math class. here are his results for the last 7 quizzes. 78, 80, 86, 82, 78, 67, 81. find the range of the data set.

Explanation:

Step1: Identify maximum value

The given data set is 78, 80, 86, 82, 78, 67, 81. The maximum value is 86.

Step2: Identify minimum value

The minimum value in the data - set is 67.

Step3: Calculate the range

The range of a data set is calculated by subtracting the minimum value from the maximum value. So, range = 86 - 67.
$86−67 = 19$

Answer:

19