Answer:
i = 
Step-by-step explanation:
=−3+4i
4i−3=z
4i−3+3=z+3
4i=z+3
= 
An observation study is where nothing changes and you record what is seen. An experimental study you have a control group and a testable group.
The answer would be: .C. The groups in an experiment are chosen at random, but not in an observational study.
Answer:
I
Step-by-step explanation:
I
It may be because the range isn't actually considered an average, it's shown using a box and whiskers diagram, Mode is the most common number. Mean is all the numbers added up and divided by the amount of values there are in the adding up process. so overall the range is less useful to show variability as it only shows the lowest and highest number in the data, and not the different individual numbers variety amongst the results
Answer:
50 i think
Step-by-step explanation:
