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Multistage sampling is a form of cluster sampling where instead of using the entire cluster, random samples from each cluster are used. This is typically used when doing opinion polls or surveys.
bar graph, double bar graph, line graph, and picto graph
I believe you meant the "independent" variable, and it is the X axis. The Y axis (the vertical one) is for the dependent variable.
that the total weight of the rocket is greatly reduced as the rocket rises
Pie graph, column graph , tally graph, Histogram