The fuel efficiencies for a sample of 27 compact, midsize, and large cars are entered into a statistical software package. Use the 0.01 significance level. Summary Groups Count Sum Average Variance Compact 12 266 22.16667 9.454096 Midsize 9 173.2 19.24444 7.265980 Large 6 100.5 16.75000 7.643 ' Additional results are shown below. ANOVA source of Variation 55 DF MS F pValue Between Groups 142.9317 2 71.46585 9.103152 0.001143 Within Groups 188.4161 24 7.85067 Total 329.6325 26 a. What is the critical value and the test statistic? (Round the final answers to 2 decimal places.) Critical value is . The test statistic is . b. Investigate whether there are any differences in the mean fuel efficiencies ofthe three cars. The mean fuel efficiencies are (Click to select) v . c. State the decision regarding the null hypothesis? The null hypothesis of equal means is (Click to select) v