A non-response bias is when subjects are selected to participate in a survey but some choose not to respond. This would lead to a portion of the population being misrepresented leading to inaccurate results. For example, those who returned the survey might be more likely to do something than those who did not complete the survey.
10 mm= 1cm
27 mm=?
27/10*1cm=2.7cm
Divide number of people who would buy it again by total number surveyed them multiply by 100 for the percent.
1815/3300 = 0.55
0.55 x 100 = 55%
The answer is 55%
