Water contents in oil was measured 4 times by each of two methods with the following results: Method 1: 31.40, 31.24, 31.18, 31.43 ppm. Method 2: 30.70, 29.49, 30.01, 30.15 ppm. Are the precisions (Standard deviations) * significantly different at the 95% confidence level? Both precision and accuracy are same They are significantly different. They are not significantly different. F calculated < F table, so standard deviations are significantly different. O
Water contents in oil was measured 4 times by each of two methods with the following results: Method 1: 31.40, 31.24, 31.18, 31.43 ppm. Method 2: 30.70, 29.49, 30.01, 30.15 ppm. Are the precisions (Standard deviations) * significantly different at the 95% confidence level? Both precision and accuracy are same They are significantly different. They are not significantly different. F calculated < F table, so standard deviations are significantly different. O
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Part b
Transcribed Image Text:Lelas 4
* Which statement is not correct
Higher standard deviation means better precision.
There is no necessary relationship between standard deviation and accuracy. O
Smaller standard deviation means better precision.
Smaller error means better accuracy. O
ls 4
Water contents in oil was measured 4 times by each of two methods with
the following results: Method 1: 31.40, 31.24, 31.18, 31.43 ppm. Method 2:
30.70, 29.49, 30.01, 30.15 ppm. Are the precisions (Standard deviations)
* significantly different at the 95% confidence level?
Both precision and accuracy are same O
They are significantly different.
They are not significantly different. O
F calculated < F table, so standard deviations are significantly different.
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