Five years ago the standard deviation of the ages of the undergraduate business students was 1.5 years. Recently a sample of 26 such students had a standard deviation of 2.0 years. We are interested to see if there has been an increase in the standard deviation of the ages of the undergraduate business students.
1. The value of the test statistic is?
2. The p-value of the test is?
3. Assuming 1% significance level, the null hypothesis is rejected if?
4. Assuming 1% significance level one can conclude that?