Mode of the data: 15,23,22,26,13,21,28,22,15,19,22,13,19,28,2115,23,22,26,13,21,28,22,15,19,22,13,19,28,21

1. Break Down the Problem

To find the mode of the given data set, we need to determine which number appears most frequently.

2. Relevant Concepts

The mode is defined as the value that appears most frequently in a data set.

3. Analysis and Detail

1. List the data:

   • 15, 23, 22, 26, 13, 21, 28, 22, 15, 19, 22, 13, 19, 28, 2115, 23, 22, 26, 13, 21, 28, 22, 15, 19, 22, 13, 19, 28, 21

2. Count the frequency of each number:

   • 13 appears 4 times
   • 15 appears 3 times
   • 19 appears 3 times
   • 21 appears 3 times
   • 22 appears 6 times
   • 23 appears 2 times
   • 26 appears 2 times
   • 28 appears 4 times
   • 2115 appears 1 time

4. Verify and Summarize

After counting the frequencies, the number that appears the most often is 22, which appears 6 times.

Final Answer

The mode of the data set is 22.