Data Item _reflns_shell.meanI_over_sigI_obs
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General 
- Item name
- _reflns_shell.meanI_over_sigI_obs
- Category name
- reflns_shell
- Attribute name
- meanI_over_sigI_obs
- Required in PDB entries
- no
- Used in current PDB entries
- Yes, in about 48.0 % of entries
Item Description
The ratio of the mean of the intensities of the reflections
classified as 'observed' (see _reflns.observed_criterion) in
this shell to the mean of the standard uncertainties of the
intensities of the 'observed' reflections in this
shell.
Additional Descriptive Information for Depositors
For this resolution shell, the average I/sigma(I)
Data Type 
- Data type code
- float
- Data type detail
- float item types are the subset of numbers that are the floating numbers.
- Primitive data type code
- numb
- Regular expression
- -?(([0-9]+)[.]?|([0-9]*[.][0-9]+))([(][0-9]+[)])?([eE][+-]?[0-9]+)?
Advisory Boundary Conditions
| Minimum Value | Maximum Value |
|---|---|
| 0.05 | 20 |
Aliases
| Alias Item Name | Dictionary Name | Dictionary Version |
|---|---|---|
| _reflns_shell_meanI_over_sigI_obs | cif_core.dic | 2.0.1 |