Answer the Question. -A Researcher Looks at the Percentage of People Having High

question 44

Multiple Choice

Answer the question.
-A researcher looks at the percentage of people having high blood pressure amongst those who exercise regularly and amongst those who do not exercise regularly.
She selects 300 people under 40, of whom 200 exercise regularly and 100 do not. Among those who
Exercise regularly the rate of high blood pressure is 10% and among those who do not exercise
Regularly it is 15%.
She then selects 300 people over 40, of whom 100 exercise regularly and 200 do not. Among those
Who exercise regularly the rate of high blood pressure is 30% and among those who do not exercise
Regularly it is 35%.
However when she combines both age groups she finds that among those who exercise regularly
The rate of high blood pressure is 23.3% and among those who do not exercise regularly it is 21.6%.
Explain the apparent inconsistency in these results.

• A)Among those who exercise regularly, younger people have a lower rate of high blood pressure, and among those who do not exercise regularly younger people have a lower rate of
• High blood pressure. But looking at both groups combined, young people have a higher rate
• Of high blood pressure.
• B)In spite of exercising, people get older.
• C)Within each age group the percentage with high blood pressure is lower amongst those who exercise, but when the age groups are combined, the percentage with high blood pressure is
• Higher amongst those who exercise.
• D)Within the under-40 age group the percentage with high blood pressure is lower amongst those who exercise, but within the over-40 age group, the percentage with high blood
• Pressure is higher amongst those who exercise.

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Definitions:

Lot Size

The quantity of units produced or purchased in a single batch, which can be optimized to minimize costs and meet demand.

Aggregating

The process of combining multiple pieces of data or information into a single group or total, often used to simplify analysis or reporting.

Average Flow Time

The average time that it takes for a unit to move through a specific process or system, from start to finish.

Economic Order Quantity

A formula used to determine the optimal order size that minimizes the sum of ordering, holding, and stockout costs.