What kind of sampling method was used

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Reference no: EM133858618

Problem

The researchers collected data about people's exercise habits from 661,000 adults, predominantly middle-aged, from six large ongoing health surveys. They segmented this data using weekly exercise time as a parameter. The ranges varied from no exercise to almost 10 times the current recommendations (moderate exercise for 25 hours per week or more). Then, 14 years' worth of death records for the group were compared to the exercise records. The effort yielded the following major results:

The group with no exercise times were at the highest risk of early death.

Minimal exercise less than the recommended level was still able to mitigate the risk of premature death by 20%.

The group who followed the generally prescribed guideline of 150 min/week of moderate exercise had reduced probabilities of early death by 31%. Get the instant assignment help.

The optimum level of health benefits were yielded in people who exercised thrice the recommended levels and had lowered their risk of premature death by 39%.

Any further increase in exercise yielded insignificant incremental benefits with regards to mortality risk. However, the exercise also did not adversely affect their mortality risk.

What kind of sampling method was used?

Reference no: EM133858618

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