I got 13 but you didn’t put any answer choices
In a box-and-whisker plot the median is shown with a line inside the box.
The box is placed on the top of a numbered line, then you can read the value correspondant to the line that indicates the median.
In this case one of the boxes has a value less than 65 and that is the answer. It is the option c, from the answer choices, which shows a median of 60.
Given that percent of computer infected which is found by quality control inspector = 1.3%
Total number of computers = 1500
Now we have to find the number of Defective computer. To find that we will just need to find the product of given defective percent by the total number of computers.
Total number of defective computers = 1.3% of 1500
Total number of defective computers = 0.013* 1500
Total number of defective computers = 19.5
Hence final answer is approx 20 computers.