Different brands (n= 20) of vaccines were tested to see how long they would to fight virus. The results are follows. Class Boundaries (months) 6.5-12.5 12.5-18.5 18.5-24.5 Frequency 5 24.5-30.5...

Calculate the
1. Mean
2. Median
3. Mode

Extracted text: Different brands (n= 20) of vaccines were tested to see how long they would to fight virus. The results are follows. Class Boundaries (months) 6.5-12.5 12.5-18.5 18.5-24.5 Frequency 5 24.5-30.5 30.5-36.5 4 Note: Class width= Upper class boundaries – lower class boundaries