(a) write the claim mathematically and identify
Ho and Ha, (b) find the critical value(s) and identify the rejection region(s),
(c) use the x square- test to find the standardized test statistic, (d) decide whether to reject
or fail to reject the null hypothesis, and (e) interpret the decision in the context of the original claim. For each claim, assume the population is normally distributed..
17. Physical Science Assessment Tests On a physical science assessment test, the scores of a random sample of 22 eighth grade students have a standard deviation of 27.7. This result prompts a test administrator to claim that the standard deviation for eighth graders on the examination is less than 29.At a = 0.10 is there enough evidence to support the administrator's claim?
(Adapted from National Center for Educational Statistics)
The solution provides step by step method for the calculation of Chi-square test statistic for testing population variance. Formula for the calculation and Interpretations of the results are also included. Interactive excel sheet is included. The user can edit the inputs and obtain the complete results for a new set of data.