Respuesta :
Lets find the upperlimit and lower limit of data .
- Lower limit=Mean-SD=20-2.8=17.2
- Upper limit=Mean+SD=20+2.8=22.8
Hence the value 12 isn't included in data
Step-by-step explanation:
Lower limit= Mean-Standard Deviation=17.2
Upper limit=Mean+ Standard Deviation= 22.8
Hence, 12 isn't included in data