7 Does ginkgo improve memory? The law allow marketers of herbs and other natural substances tomake health claims that are not supported by evidence. Brands of ginkgo extract claim to "improvememory and concentration." A randomized comparative experiment found no statisticallysignificant evidence for such effects. The subjects were 350 healthy volunteers over 60 years old.They were randomly assigned to ginkgo or a placebo pill (a dummy pill that looks and tastes thesame). All the subjects took a battery of tests for learning and memory before treatment startedand again after six weeks.A. If the results were statistically significant, can the results of this study be generalized to a largerpopulation? Can cause-and-effect be inferred? Explain.B. Explain why it is advantageous to use 350 volunteers in this study, rather than, say, 30volunteers.C. Name a confounding variable that was controlled in this experiment and explain why it wasbeneficial to control that variable.

Name: 7 Does ginkgo improve memory? The law allow marketers of herbs and oth
Uploaded: 2024-03-20T07:06:41.000Z
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Description: 7 Does ginkgo improve memory? The law allow marketers of herbs and other natural substances tomake health claims that are not supported by evidence. Brands of ginkgo extract claim to "improvememory and concentration." A randomized comparative experim

The study involved 350 volunteers over the age of 60 years. Each subject was assigned to a treatment…

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A. If the results were statistically significant, can the results of this study be generalized to a larger population? Can cause-and-effect be inferred? Explain. B. Explain why it is advantageous to use 350 volunteers in this study, rather than, say, 30 volunteers. C. Name a confounding variable that was controlled in this experiment and explain why it was beneficial to control that variable.