The following table shows the number of bacteria colonies present in each of several petri dishes after

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The following table shows the number of bacteria colonies present in each of several petri dishes after E. coli bacteria were added to the dishes and they were incubated for 24 hours. The "soap" dishes contained a solution prepared from ordinary soap; the "control" dishes contained a solution of sterile water. (These data were seen in Exercise 6.6.9.)

Here is computer output for a t test.
t = 0.9095, df = 10.43, p-value = 0.3836
alternative hypothesis: true difference in means is not equal to 0
(a) State the null and alternative hypotheses in context.
(b) If α = 0.10, what is your conclusion regarding H0?
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Statistics For The Life Sciences

ISBN: 9780321989581

5th Edition

Authors: Myra Samuels, Jeffrey Witmer, Andrew Schaffner

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