A Lab Technician Is Tested for Her Consistency by Making $1.2 \mathrm { mg } / \mathrm { dL }$

question 121

Multiple Choice

A lab technician is tested for her consistency by making multiple measurements of the cholesterol level in one blood sample. The target precision is a standard deviation of $1.2 \mathrm { mg } / \mathrm { dL }$ or less. If 12 measurements are taken and the standard deviation is
$2.1 \mathrm { mg } / \mathrm { dL }$ , is there enough evidence to support the claim that her standard deviation is greater than the target, at $\alpha = 0.01$ ?

• A) No, since the \(\chi ^ { 2 }\) test value \(19.25\) is less than the critical value \(26.217\).
• B) Yes, since the \(\chi ^ { 2 }\) test value \(33.688\) is greater than the critical value \(24.725\).
• C) No, since the \(\chi ^ { 2 }\) test value \(19.25\) is less than the critical value \(24.725\).
• D) Yes, since the \(\chi ^ { 2 }\) test value \(33.688\) is greater than the critical value \(26.217\).

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