Perform the Required Chi-Square Hypothesis Test $s = 27.1$ at The Chi-Square

question 100

Essay

Perform the required chi-square hypothesis test. Preliminary data analyses and other information indicate that it isreasonable to assume that the variable under consideration is normally distributed. Use the critical-value approach or theP-value approach as indicated.
-In 2000, the standard deviation of the scores of all students taking a particular test was 20.3. In 2005, the standard deviation of the scores of a random sample of 18 students taking the same test was $s = 27.1$ . At the $5 \%$ level of significance, do the data provide sufficient evidence to conclude that the standard deviation, $\sigma$ , of all 2005 scores is different from the 2000 standard deviation of $20.3$ ? Use the P-value approach.

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