Z discs

... think they were killing the bacteria, whilst they actually only prevented their growth - because the effect looks the same when you put the discs on the agar right after inoculation ;) After all, as far as I know most of the common household disinfectants are fairly weak, and many bacteria ...

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... the effectiveness of household disinfectants on bacteria anyways... my teacher told me to grow the bacteria on a agar plate and then put filter discs saturated in varius disinfectants on the bacteria the bacteria cant grow around the area of the disinfectant if it kills it, so there is a clean ...

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... not allow the bacteria to grow even in favorable conditions. The null hypothesis here, is the assertion that the mean diameter of the experimental discs is the same as the mean diameter of the control discs.) ----------------------------------- Anova findings: Source of Sum of d.f. Mean F Variation ...

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... is that the antibiotic inhibited the growth of the bacteria as indicated by the significantly larger halo of non-growth surrounding the treated discs compared to control, non-treated discs. That the 95% confidence intervals about the means don't overlap for the two groups is also evidence that ...

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The null hypothesis here, is the assertion that the mean diameter of the experimental discs is the same as the mean diameter of the control discs. The only things you “put in” are the means and standard deviations of the two groups when you calculate the t-statistic ...

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