1. First,  find the mean: 87.2
  
 2. We find the distance from each data point to the mean, 
 First point: 83- square distance from mean- 17.64
 85-87.2-4.84
 82 - 87.2 -27.04
  
 93-87.2 squared-33.64
  
 83-87.2- 17.64
  
 84-87.2-10.24
  
 95-87.2-60.84
  
 87-87.2-0.04
  
 86-87.2-1.44
  
 94-87.2- 46.24
  
 Now, add everything up: 201.96
 10 data points, so 201.96/10=20.196
  
 Take the square root of that to get:\(\sqrt{20.196}=4.49..\)
 So, 4.6?
  
 
