Chi-square for the standard deviation

Reference no: EM1321549

A lab technician is tested for her consistency by taking multiple measurements of cholesterol levels from the same blood sample. The target accuracy is a standard deviation of 1.2 or less. If 20 measurements are taken and their standard deviation is 1.8, is there enough evidence to reject the claim that her standard deviation is within the limit at ∞ = .01?

a. No, comparing the test value 45.00 and the critical value 37.566.

b. Yes, comparing the test value 42.75 and the critical value 36.191.

c. Yes, comparing the test values 45.00 and the critical value 37.566.

d. No, comparing the test value 42.75 and the critical value 36.191.

Reference no: EM1321549

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