(Answered) Looking for some help on how to explain the 4 examples

Economics

Looking for some help on how to explain the 4 examples below for these three hypothesis. Not looking for answers to them, but just a start on how to approach each example.

Null hypothesis

Directional Research hypothesis

Non-directional research hypothesis

Effects of radiation and chemotherapy on cancer cells
Time needed to complete a statistics problem by hand and by a computer
Amount of time spent on the internet by elementary-age students and college-age students
Amount of money spent at Starbucks among male college students and female college students

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