"extra samples" is correct and usable in written English.
You can use it to refer to additional examples of something. For example, "The manager provided extra samples of the product so that we could make an informed decision."
And then I'd like for you to check the supply closet for any extra samples of Advil.
Confirmation tests performed on extra samples prepared with varying coating thicknesses indicated a good agreement with the experimental results.
Out of the 100 pitches, 10 were sampled in triplicate to collect extra samples for counterchecks (60 samples) and additional investigations (60 samples).
This gives numerically the minimum number of extra samples to be added at the signal's and subband's edges; a vital issue for many filter-banks-based architectures like with the discrete wavelet transform (DWT).
Of course extra samples can only serve to help increase accuracy and ultimately user friendliness for customers.
Standard brain samples were taken according to the local protocol, and extra samples were taken from clinically relevant areas and grossly abnormal areas.
Detailed quantitative information on overall extraction ratios, size specific extraction ratios, missed and extra sample components can be made by comparing a reference sample to the actual sample.
Moths were thus worth the extra sampling effort, especially since the groups they indicated were more treatment-specific (mainly one or two deer density treatments).
However, the common perception of the extra sample size savings is largely unjustified without the strong assumption that the observed HC response rate is equal to the true control response rate.
By using an asymmetric PCR method, the melting-probe is able to detect an extra sample in the melting stage effectively while it almost has little influence on the amplification detection.
The computations (17) are entirely sampling based, which is useful for the nonlinear case but introduces extra sampling errors.
