To find the average:
1.Number of data: n=100
2. Find the sum of datas: multiply each length by its frequency and sum the resulting products:
[tex]\begin{gathered} 25*2=50 \\ 26*9=234 \\ 27*10=270 \\ 28*12=336 \\ 29*20=580 \\ 30*19=570 \\ 31*13=403 \\ 32*15=480 \\ \\ 50+234+270+336+580+570+403+480=2923 \end{gathered}[/tex]
3. Divide the result in step 2 into the number of data:
[tex]Average=\frac{2923}{100}=29.23[/tex]
Average: 29.23cm
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Median: Identify the two median datas (number 50 and 51) and find the average between those datas:
As data number 50 and 51 are 29cm the median is 29cm
Median: 29cm
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Modal: Identify the data with greatest frequency
Modal: 29cm
