Transcript Statistical Check List by Nature Cell Biology

Checklist
of statistical
adequacy
Statistical
Check List
by Nature Cell Biology
Graphs
Were effect sizes distorted? (by truncation of y axis, etc.)
Were error bars absent
Were error bars unlabeled?
P-values and significance level
Provided alpha for all statistical tests
Specified whether tests were one-sided or two-sided
Reported actual P values for primary analyses
Discussed adjustments for multiple testing
Randomization
Explained method of treatment assignment (randomization, if any)
Described randomization procedures or other ways to eliminate bias in sampling (in particular
for experiments involving animals)
Sample Size
Reported n at start of study and for each analysis
Provided sample size calculation or justification
Explained reasons for any discrepancy between initial n and n for each analysis
Explanation of data exclusions, if any
Selection of Statistical Tests
Identified all statistical methods unambiguously
Explanation of unusual or complex statistical methods
If statistical methods were described adequately, were any of them clearly inappropriate?
Stated whether the data met the assumptions of the test
Explained any data transformation
Are mean and standard deviation used to describe data sets that may be non-normally
distributed or when the sample size is very small?
When the sample size is small (less than about 10), authors should use tests appropriate to
small samples or justify their use of large-sample tests.
Was the unit of analysis clearly stated in all comparisons?
Yes
No