A Medical Researcher Is Interested in Determining If There Is $x _ { 0 } ^ { 2 }$

question 36

Multiple Choice

A medical researcher is interested in determining if there is a relationship between adults over 50 who exercise regularly and low, moderate, and high blood pressure. A random sample of 236 adults over 50 is selected and the results are given below. Find the critical value $x _ { 0 } ^ { 2 }$ to test the claim that regular exercise and low, moderate, and high blood pressure are independent. Use $\alpha = 0.01$ .
$\begin{array} { l | c c c } \text { Blood Pressure } & \text { Low } & \text { Moderate } & \text { High } \\\hline \text { Reg. Exercise } & 35 & 62 & 25 \\\text { No Reg. Exercise } & 21 & 65 & 28\end{array}$

• A) 9.210
• B) 9.348
• C) 6.251
• D) 5.991

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Definitions:

Labour Efficiency Variance

Labour efficiency variance is the difference between the actual hours worked and the standard hours expected, multiplied by the standard labor rate, used to assess workforce performance.

Standard Labour Rate

A predetermined rate of pay established for work performed, used in budgeting and costing calculations.

Price Variance

A variance that is computed by taking the difference between the actual price and the standard price and multiplying the result by the actual quantity of the input.

Direct Material

Direct Material includes raw materials that are directly incorporated into a finished product and can be easily traced to the product itself.