PLEASE HELP I WILL GIVE MEDAL AND FAN!!!
The California Board of Education wants to know how 5th grade students are doing in math this year. They get a list of all 5th graders in the state of California and look at the overall math grades of every 10th student on the list. Then they add the scores and divide to get an average. What kind of sampling is this?

random sampling
responses to a survey
add and divide survey
biased sampling

Question

PLEASE HELP I WILL GIVE MEDAL AND FAN!!! 
The California Board of Education wants to know how 5th grade students are doing in math this year. They get a list of all 5th graders in the state of California and look at the overall math grades of every 10th student on the list. Then they add the scores and divide to get an average. What kind of sampling is this?

    random sampling
    responses to a survey
    add and divide survey
    biased sampling

campbell_st · Answer

well I would say its a systematic sampling technique, they use the rule of select every 10th. 

But that doesn't seem to be in the list