Here are the IQ test scores of 10 randomly chosen fifthgrade

Here are the IQ test scores of 10 randomly chosen fifth-grade students: 144 139 126 123 123 127 94 109 118 117 The mean of these scores (rounded to one decimal place) is .

Solution

Getting the mean, X,  
  
X = Sum(x) / n  

Summing the items, Sum(x) =    1220

As n =    10

Thus,  

X =    122.0 [ANSWER]