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Question: 1 which of the following is not a valid method...

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1) Which of the following is NOT a valid method for detecting determinate errors?

a. analysis of the sample by another method
b. analysis of blanks
c. calculation of the standard deviation

2) A cholesterol test kit gave the following results for 4 measurements of the same solution:

159 mg/dL
163 mg/dL
164 mg/dL
174 mg/dL

Which of the statements below correctly answer the following question:

Can any of these data points be rejected at a 90 percent confidence level?

a. YES, they can all be rejected.
b. There aren't enough data points to decide.
c. YES, both 174 and 159 mg/dL can be rejected.
d. NO, none can be rejected.

c is incorrect

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