n important factor in survey research is how closely the sample reflects the population under study. This is referred to as sample

representativeness

Step-by-step explanation: A representative sample is a group or set chosen from a bigger statistical population or group of things or instances that adequately replicate the larger group in step with whatever characteristic or quality is under study.

step-by-step explanation:

given that there are two triangles j'k'l' and jkl>

the former is got by dilating the second one.

when drawn on a grid, (graph paper) coordinates of vertices of first triangle is

(6,12)j, (9,6)k and (12,9)l

side jk has length = distance between j and k

=

side j'k'=distance between j' and k'

=

ie j'k'l' has sides 1/3 of that of corresponding sides of jkl.

hence scale factor of 1/3 is used to get j'k'l'from jkl