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I have 10 samples with sample size $N=30$ in each case.

Null Hypothesis = (population mean) $\mu\le14$

Alternative Hypothesis= (population mean) $\mu>14$

confidence level = 0.95

there is an equation for hypothesis testing $Z$ $$ Z=\frac{(\bar{x}-\mu)}{\frac{SD}{\sqrt{N}}} $$ can some one tell me please how to apply this equation for the 10 samples that I have selected.

can the hypothesis be tested using the 10 samples at once rather than having seperate hypothesis testing for each sample?

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I don't really understand your question. Are you asking about how to do a one-sample t-test? You're just about there already. Are you asking about corrections for multiple comparisons (given that you appear to want to do 10 tests)? – gung Feb 28 '12 at 5:12
Login and you will be able to edit your questions. – mpiktas Feb 28 '12 at 11:12
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@Tom> We could better help if you explain the nature of your data – Stéphane Laurent Feb 28 '12 at 12:55
Hello, are you asking if you can check the test for 10 different samples? e.g: some sort of a multivariate hypothesis test? – Tal Galili Feb 28 '12 at 17:46

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