【Daily Question】November 15, 2015 – Participate for +2 wealth； +3 to 8 wealth for correct answers
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This post was last edited by zjp on 2015-11-17 08:17. To increase the popularity of the chemical analysis section, a \"One Question per Day\" campaign has been launched; this aims to foster active technical exchanges while also providing financial rewards to users. 【Daily Question】 (Single-choice question) Three parallel determinations were carried out on a sample, yielding an average CaO content of 30.60%, while the actual content is 30.30%. Then, 30.60% – 30.30% = 0.30%; what does this value represent? A Relative error B Absolute error C Relative deviation D Absolute deviation. Correct answer: B. Reply with your answer in the comments; participating in the quiz earns you +2 wealth points. Getting all answers correct grants an additional +3 to +8 wealth points. Those who provide thorough analyses and explanations for the questions or answers, or include detailed calculation processes, will receive extra wealth rewards. If your answer is correct and your analysis and explanation are accurate, it will be marked as the best reply (or the best assistance). Feel free to answer. Note: We will close this post after 24 hours, and at that time we will announce the best reply (the best assistance), as well as the answer and explanation.
Three parallel determinations were carried out on a certain sample, yielding an average CaO content of 30.60%, while the actual value was 30.30%. Therefore, 30.60% – 30.30% = 0.30%, which corresponds to (A)
Three parallel measurements were taken on a certain sample, yielding an average CaO content of 30.60%, while the actual value was 30.30%. Therefore, 30.60% – 30.30% = 0.30%, which represents (C). A Relative error B Absolute error C Relative deviation D Absolute deviation
C.............................................
I don’t agree with your answer. The average value of the three measurements is 30.6; it’s not the absolute value, so how can it be an absolute error?
When three parallel measurements were taken on a certain sample, the average CaO content was 30.60%, while the actual value was 30.30%; therefore, 30.60% – 30.30% = 0.30%, which corresponds to (B). A Relative error B Absolute error C Relative deviation D Absolute deviation
When three parallel measurements were taken on a certain sample, the average CaO content was 30.60%, while the actual value was 30.30%; thus, 30.60% – 30.30% = 0.30%, which represents the (B absolute error).
When three parallel measurements were taken on a certain sample, the average CaO content was 30.60%, while the actual value was 30.30%; therefore, 30.60% – 30.30% = 0.30%, which corresponds to (B). A Relative error B Absolute error C Relative deviation D Absolute deviation
B Absolute error. . . . . . . . . . . . . . .