Instrument
Statistics Page Fields
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Instrument
Statistics Page Fields
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Fields:
Instrument Statistics Screen
Here is
information about the fields (features) on the Instrument
Statistics screen.
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Instrument
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The name of
the instrument.
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Calibration
Sample
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Classification
of the statistics.
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Sample
Population
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Reference
population of the statistics.
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Scaling
Model used for Calibration
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IRT model used
for calibration.
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Total
Number of Items
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Item count
within instrument.
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Scale
Score
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Nine instances
of scale score values for the current instrument.
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SE
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Nine instances
of standard error values for the current instrument.
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Reliability
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Cronbach’s
alpha reliability index.
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Average CAT
Length for Target SE
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The expected
CAT length to attain the target standard error (SE)
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Average SE
for Target CAT Length
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The expected
standard error (SE) for the target CAT length.
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Scale Score
Definition
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The type of
scale score.
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Sample
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A description
of the group of examinees.
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N
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Number of
examinees included in the sample.
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Score
Distributions: Raw
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Row includes
sample mean which is the average raw score and seven instances of
raw score percentile statistics and score distribution at the
specified points of the bell curve (P5, P10 etc.).
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Score
Distributions: Scale
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The
distribution of scale scores.
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Update
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Presents a
dialog box with editable fields.
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Back
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Navigates back
to the previous screen.
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Save
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Saves changes
and updates within the Update dialog box.
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Cancel
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Does not save
any changes within the Update dialog box.
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