n_0529 - Hypothesis tests Assess the evidence provided by...

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Chapter 6 Section 6.2 and 6.3 1 Hypothesis tests Assess the evidence provided by the data in favor of some claim about the population. Suppose our state claims that the average size of an elementary school classroom is 24 students. Suppose we find that of the 48 primary classes in our district, the average class size is 25.3. Based on this, you question the state’s claim. Is it just random variation that has resulted in your sample having more than the average or is the average actually greater than the state claims? We answer this question by conducting an hypothesis test.
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Chapter 6 Section 6.2 and 6.3 2 Stating hypotheses Null hypothesis, H o : this is a specific value of a population parameter. The null hypothesis is what we believe until we see statistical evidence that persuades us to believe something different. Alternative hypothesis, H a : this is a different value from the value of the parameter in the null hypothesis. The parameter in the alternative hypothesis does not have a specific value.
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