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Originally Posted by scorcherjf
How are you even measuring the null hypothesis? Do you have a way to measure exactly what percentage of bacteria is killed per sample?
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Originally Posted by ideliver
80% probabilty to reject the null hypothesis...i am embarrased that I can't do this...i appreciate the effort!!
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Yes.
The hypothesis is that it kills 99.9% of bacteria, so I would except no growth on the treatment group.
But, we can go to the lab and do colony counts if needed. The microbiology part is easy.
I was trying to do three things at once last night and was hoping that someone could get this easily.
I just need the sample size to figure out how many petri dishes to get.