Asap ! on the last question need it as soon as possible 10 points to find the average grades scored by students in science and math, the principal of a school sends a questionnaire to the top five students in each grade of the high school. is the sample used by the principal random? will a generalization from this sample be valid? the sample used by the principal is . a generalization made from this sample is . first blank : random , or not random second blank : valid , or not valid mee