Need statistics help with null and alternative hypothesis

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I am a little confused about how you identify the null hypothesis...

but here is the question...

Nov 10th, 2015

Thank you for the opportunity to help you with your question!

The null hypothesis, H0,usually samples observations result purely from chance.it is the opposite of the alternate hypothesis.

Alternative hypothesis. The alternative hypothesis, denoted by H1 or Ha, is the hypothesis that the  sample observations are influenced by some non-random cause.

Please let me know if you need any clarification. I'm always happy to answer your questions.
Nov 10th, 2015


okay, so what about this question...

The National Institute of Mental Health published an article stating that in any one-year period, approximately 9.5 percent of American adults suffer from depression or a depressive illness. Suppose that in a survey of 100 people in a certain town, seven of them suffered from depression or a depressive illness. If you were conducting a hypothesis test to determine if the true proportion of people in that town suffering from depression or a depressive illness is lower than the percent in the general adult American population, what would the null and alternative hypotheses be?

Nov 10th, 2015

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Nov 10th, 2015
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