In a study, the independent variable is the thing that you change to see how the change produces different results. In this study, the independent variable would be the use of nicotine.
A vaccination can produce immunity to smallpox
These would include a small job market, an international recession, or technological advancements that affect an industry
Answer:
poorer memory and reasoning than usual
Explanation:
According to my research on studies conducted by various neurologists, I can say that based on the information provided within the question her performance was most likely affected by poorer memory and reasoning than usual, caused by lack of sleep and energy. Neurologists, believe that lack of sleep impairs a person's ability to focus and learn efficiently as well as not allowing a memory to stick in order for it to be recalled in the future.
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