Answer: 3.2
Step-by-step explanation:
Mean is sum of values, divided by number of examples.
If we write down score for each student, we will receive a long list of scores:
0,0,1,2,2,2,3,3,3,3,3,3,4,4,5,5,5,6,6
Now let's sum total scores achieved by students:
0+0+1+2+2+2+3+3+3+3+3+3+4+4+5+5+5+6+6 = 60
So sum of our values (scores) is 60.
Number of examples in our case is number of students, so, total number of students is:
2+1+3+6+2+3+2=19
So mean score in this group can be calculated as:
mean
= total sum / number of examples
= sum of scores / number of students
= 60/19
= 3,158
So closes answer is 3.2.
