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In online communities knowledge levels of users are unclear and therefore value of answers and comments are unknown.
4. Plutynski and Rosenberg have stressed the value of answers to how-possibly and why-necessarily (the distinction corresponds to Clerk Maxwell's distinction between illustration and explanation).
If 80% of the questions had been completed, the missing values in incomplete questionnaires were replaced with the mean value of answers given by respondents [ 21].
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For each scale - depression (CES-D), anxiety (SCL-90-R) and PTSD (PCL-C), cases with three or less missing values on a scale were maintained in the analysis with the missing values replaced by average value of answered items on that scale, while the cases with more than three missing values on a scale were excluded from the analysis.
The validity and reliability of the test questions are determined from the values of Answer time, Coefficients of Reliability, Discrimination, Difficulty and Correlation.
One may question the value of such answers, and afterwards it is impossible to distinguish knowledgeable from unknowledgeable answers.
What is the value of the answers?
The lawyer will note the value of stock answers like "I don't know" or "I don't remember".
Value of the Answers: There is immediate, incremental cost savings of not having to manage and route the question to the appropriate person and assign them to the task of answering (i.e. overhead cost savings) as well as the value of capturing answers that never would have been asked in more formal channels.
The value of getting answers to questions immediately is a pretty big deal".
This difference was particularly evident on the 220-mAs images, where the mean value of correct answers by human observers was 9%, whereas according to the model observer a 2-mm diameter object is detectable.
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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com