Question

The ratings received by a company for its 9 products is given. What is mean rating of the products?


Number of products Rating

• A. 4
• B. 3.6
• C. 4.5
• D. 3.5

Answer 1

The correct option is B 3.6

The mean of the data set is the sum of the data divided by the number of data values.

Mean = $\frac{sumofalldata}{numberofdata}$

Mean = $\frac{2+3+3+3\frac{1}{2}+3\frac{1}{2}+4+4+4\frac{1}{2}+4\frac{1}{2}}{9}$

= $\frac{16+\frac{7}{2}+\frac{7}{2}+\frac{9}{2}+\frac{9}{2}}{9}$

= $\frac{16+\frac{32}{2}}{9}$

= $\frac{32}{9}$ = 3.55

= 3.6

Hence, the mean rating is 3.6