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Statistical methods for the determination of noncompliance with occupational health standards.

Authors
Leidel-NA; Busch-KA
Source
NIOSH 1975 Apr; :1-70
Link
NIOSHTIC No.
00039609
Abstract
Procedures are presented for determining if the 95% Lower Confidence Limit of the concentration of a contaminant in an occupational environmental air sample or the arithmetic average for a group of such samples exceeds an occupational health standard. The determination can be made with a known maximum probability of making an incorrect decision that a state of noncompliance exists. Recommendations are given concerning the duration of samples, the number of samples to take and the periods during the work day when the samples should be collected. When the true arithmetic average air concentration is estimated from the mean of a group of random grab samples, the log-normal distribution is assumed for the individual grab samples. When only one sample is examined or when one or several samples are taken for the entire time period for which a standard is defined the normal distribution is assumed. In the latter case, variability over time is absent but sampling and analytical errors are present.
Keywords
Air-quality-control; Statistical-analysis; Air-contamination; Exposure-limits; Air-sampling; Sampling-methods; Sampling-requirement; Air-analysis; NIOSH-Author; NIOSH-Publication
Publication Date
19750401
Document Type
Numbered Publication
Fiscal Year
1975
NTIS Accession No.
PB83-180414
NTIS Price
A05
Identifying No.
(NIOSH) 75-159
NIOSH Division
DLCD
Source Name
National Institute for Occupational Safety and Health
State
OH
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