A software beta test is a test release of the software. Normally beta testers then take the software and test it out and report any bugs in the software. A few more tests down the road is called a Release Candidate then after those there is the final version.
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A brief explanation of the difference between beta and alpha test is that alpha test is usually in-house and is part of basic development. Beta test is right before product release and typically includes customer input.
alpha naphthol with CCl4(carbon tetrachloride) gives blue colour whereas beta naphthol with CCl4 gives no colour. that is the distinction test between alpha and beta naphthol.
beta glucose
is bacillus subtilis beta or alpha hemolysis
No. For a convex combination of distributions, the density is also a convex combination of the individual densities and one can easilly check that the convex combination of beta densities is not again a beta density.