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3 January, 09:30

Imagine that a researcher performs an experiment examining the effects of nutrition on memory. each subject is randomly assigned to one of three groups: high-protein diet; high-fiber diet; standard diet (control). after a month on this diet, each subject undergoes a memory test. the experimenter finds that memory performance is somewhat better for the high-protein and high-fiber groups than for the control group, but the effect of nutrition is not statistically significant. thus, the experimenter accepts the null hypothesis. the experimenter hypothesizes that the effect was weak because the experiment was only 1 month long. a new experiment is then conducted that is identical to the first, except with 3 months on the diet. now a significant effect of nutrition is found. from these two experiments, the experimenter is justified in concluding that: [select two that are correct]

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  1. 3 January, 09:51
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    A novel study has demonstrated that quality of the diet may affect the risk of cognitive decline, including thinking skills and memory. It has been shown that when one consumes heart-healthy diet, which is low in saturated fat, one minimizes the threat for diabetes, high blood pressure, and obesity, all of which are considered to donate to the issue of memory loss.

    In the given experiment it was concluded that nutrition affects memory when the individuals are on the diet for three months, and there is not enough proof to conclude that nutrition influences memory when the individuals are on the diet for only a single month.

    Hence, the correct answers are options A and C.
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