A comparison of the precisions of two machines developed for extracting juice from oranges is to be made using the following data. Machine A Machine B $2 . 49.2 02 52 - 33.5 g2 1 = 31 n = 31 (a) Is there sufficient evidence to indicate that there is a difference in the precision of the two machines at the 5% level of significance? (Round your answers to two decimal places. 1-2. Null and alternative hypotheses: . Ho: 012 = 072 versus Ha: 012 # 022 O Ho: 012 #2? O Ho: 012 - 072 versus Ha: 012 02 2 3. Test statistic: F = 148 4. Rejection region: F > 5. Conclusion: O Ho Is rejected. There is sufficient evidence to indicate a difference in the precision of the two machines. Ho is not rejected. There is insufficient evidence to indicate a difference in the precision of the two machines. O Ho Is rejected. There is insufficient evidence to indicate a difference in the precision of the two machines. O Ho is not rejected. There is sufficient evidence to indicate a difference in the precision of the two machines. (b) Find a 95% confidence interval for the ratio of the two population variances. (Round your answers to two decimal places.) to