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Statistics at HelpWithAssignment.com (Hypothesis Testing),[object Object],	www.HelpWithAssignment.com,[object Object]
Hypothesis is making an assumption. ,[object Object],In Statistics, a Hypothesis or an assumption is taken first and then the Hypothesis is tested whether it is accurate or not. ,[object Object],Hypothesis testing is a study based on statistical accuracy of an experiment. ,[object Object],If the result is positive, then it is called statistically significant. ,[object Object],Hypothesis Testing,[object Object],	www.HelpWithAssignment.com,[object Object]
There are two types of statistical hypotheses.,[object Object],A Null Hypothesis and an Alternate Hypothesis. ,[object Object],A Null Hypothesis is denoted by H0, it is actually an assumption that the simple observations are purely from chance.,[object Object],Alternate Hypothesis on the other hand is denoted by H1 or Ha, assumes that that sample is influenced by a non-random cause.,[object Object],Hypothesis Testing,[object Object],	www.HelpWithAssignment.com,[object Object]
Suppose that we want to test the hypothesis with a significance level of .05 that the climate has changed since industrialization.  ,[object Object],Suppose that the mean temperature throughout history is 50 degrees.  ,[object Object],During the last 40 years, the mean temperature has been 51 degrees and suppose the population standard deviation is 2 degrees.  What can we conclude?   ,[object Object],An example for Hypothesis Testing.,[object Object],	www.HelpWithAssignment.com,[object Object]
We have,[object Object],	H0:  µ = 50 or the temperature is normal ,[object Object],		H1:  µ ≠50 or the temperature has changed,[object Object],We compute the z score: ,[object Object],(51-50)/(2/√40) = 3.16,[object Object],The table gives us 0.9992 ,[object Object],So that p = (1 – 0.9992)(2) = 0.002 ,[object Object],Since 0.002 < 0.05  ,[object Object],Solution,[object Object],	www.HelpWithAssignment.com,[object Object]
We can conclude that the Alternate Hypothesis is accepted and there has been a change in temperature.  ,[object Object],Solution,[object Object],	www.HelpWithAssignment.com,[object Object]
At HelpWithAssignment.com we provide best quality Assignment help, Homework help, Online Tutoring and Thesis and Dissertation help as well. ,[object Object],HelpWithAssignment.com,[object Object],	www.HelpWithAssignment.com,[object Object]
For any of the above services you can contact us at http://www.helpwithassignment.com/ andhttp://www.helpwithassignment.com/statistics-assignment-help,[object Object],HelpWithAssignment.com,[object Object],	www.HelpWithAssignment.com,[object Object]
You can follow us on our blog at http://helpwithassignment.blogspot.com/ and http://helpwithassignment.wordpress.com/,[object Object],Thank You,[object Object],HelpWithAssignment.com,[object Object],	www.HelpWithAssignment.com,[object Object]

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Statistics at HelpWithAssignment.com (hypothesis testing)

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