Stats Flashcards
On a run chart a shift is
6 or more data points above or below the median, probably indicates a change
A trend on a run chart is
5 data points ascend or descend
Run chart astronomical point?
one point very different to the rest of the data
A run on a run chart, is
when data points remain above or below the median
What is a receiver operater characteristic curve? And how to interpret.
true +ve rate (sensitivity) on Y axis & false +ve rate (1-specificty) on x axis. Area under the graph of 1 is perfect & less than 0.5 is useless.
Availability heuristic
recently available information may be too readily applied inappropriately
Commission bias
tendency towards action rather than inaction
Confirmation bias
Tendency to only notice evidence that confirms your opinion & not acknowledge that to the contrary.
Base rate neglect
ignoring the true prevalence of a condition, focusing on the rare
Diagnostic neglect
Relying on a diagnosis without questioning it.
What is a priority matrix
maps impact against difficulty
Root cause analysis
5x whys
Ishikawa diagram
fishbone diagram
Process map
Maps process, if you don’t know this you be idiot.
Pareto diagram
Bar chart with frequency of errors in descending order, reveals ‘vital few’ & useful many
P-value is statistically significant when…
<0.05
Sensitivity=?
True positives/all those with the disease
Specificity=?
True negatives/ all those w/out disease
PPV=?
True +ves/all those w/ +ve results
NPV=?
True -ves/ all those
