STATS 13 Chapter Notes - Chapter 3.2: Statistic, Null Hypothesis, Confidence Interval
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Section 3. 2: 2sd and theory-based confidence intervals for a single. We find the confidence interval by conducting repeated tests of significance and changing the probability specified by the null hypothesis to see whether or not the hypothesized value was plausible. In this section, we will explore how we can use the idea of standardization to construct confidence intervals. This method is called the two standard deviation method (2sd method) Gallup poll based on a random sample of 1,034 adults. They were asked whether the healthcare law (the affordable care act) had affected the respondents or their family. 69% responded that the law had no effect. Gallup are constantly revising methods to ensure representation of women, minority groups, and younger individuals. Is it sufficient to announce that 69% of adult americans have not felt any impact from the affordable care act.
