A Lab Technician Is Tested for Her Consistency by Making

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 1.4 mg/dL or less. If 16 measurements are taken and the standard deviation is 2.1 mg/dL, is there enough evidence to support the claim that her standard deviation is greater than the target, at = .01?

A) Yes, since the χ² test value 33.750 is greater than the critical value 32.000.
B) No, since the χ² test value 22.50 is less than the critical value 30.578.
C) Yes, since the χ² test value 33.750 is greater than the critical value 30.578.
D) No, since the χ² test value 22.50 is less than the critical value 32.000.