What happens when the data in an investigation does not support the original hypothesis

You Literally address this in the conclusion. If you want you could try the expirement again but you are not supposed to change the hypothesis.

the animal that would be cutest if scaled down to the size of a cat? elephant

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what do the different brain waves do?

explanation:

brainwaves are produced by synchronised electrical pulses from masses of neurons communicating with each other. brainwaves are detected using sensors placed on the scalp. brainwave speed is measured in hertz (cycles per second) and they are divided into bands delineating slow, moderate, and fast waves.