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Stress Reduction

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Consider each of the following statements. Does the information in the three sources support the inference as stated?

Yes

No

Yes

No

"The company has a well designed plan to make sure that employees are randomly assigned to participate either in tai chi or yoga."

Yes

No

"The stress reduction measurements would be more accurate at describing the effects of tai chi and yoga if the program had lasted one year instead of six months."

Yes

No

"The Delta Ex account may have played an important role in the stress reduction measurements."