Question

The frequencies of 13,15,19,17 are 1,2,3,4 respectively Then arithmetic mean is​

Answer 1

Step-by-step explanation:

mean= (sum of observations/ number of observations?)

so 1*13+15*2+19*3*17*4 will be sum of observations

=13+30+57+68

= 168

and no of observations = 1+2+3+4= 10

so mean = 168/10

= 16.8