The phrase "a minimum of three observations" is correct and usable in written English.
It can be used when specifying a required number of observations in a study, report, or analysis.
Example: "To ensure the validity of the results, we need to collect a minimum of three observations from each participant."
Alternatives: "at least three observations" or "no fewer than three observations".
As considering firm-specific coefficients would require multiple-year observations of one firm, we perform the regression on firms matched on year t and industry j as in DeFond and Jiambalvo (1994) and require a minimum of six observations per regression.
The obtained value exceeds the FDA requirements of R ≥ 0.999 from a minimum of five observations [ 17, 18].
A maximum of four joinpoints were allowed, and a minimum of six observations were required between two joinpoints (including any joinpoint that falls on an observation).
With respect to varying the number of observations, results in Table 2 show that a minimum of five observations is required to obtain a g-coefficient above 0.80.
A minimum of two observations were conducted independently by each of the CRAs over a one-month period in the three plantation estates across 14 camps.
These results, similarly to Hebert and Bravo [ 5], suggest that a minimum of five observations were required to achieve "acceptable" reliability.
A minimum of five observations in a GO class and parent class plus a minimum ratio of 2 for the observed vs. expected numbers were required for further consideration.
Methylation dynamics were calculated by comparing data sets using the SeqMonk chi-square filter with a p value requirement of <0.05 after multiple-test correction, and a minimum of ten observations and 10% difference.
We enforced a minimum of five observations in both the laboratory and field per functional group, thereby eliminating data for omnivores tested against Lepidopteran-active proteins, parasitoids tested against Coleopteran-active proteins and all data concerning pollinators.
Observations were carried out across 13 schools (Alt Valley, n = 4; Liverpool City and North, n = 4; Liverpool South, n = 2; Liverpool East, n = 2; Central, n = 1), with a minimum of two observations overall conducted at each school (mean number of observations at each school = 3.8; range 2 to 8).
