(Answered)-In a survey of 151 publicly-traded companies, the average - (2025 Updated Original AI-Free Solution

Question

1. In a survey of 151 publicly-traded companies, the average price-earnings ratio was 17.8 with a standard deviation of 8.7. When testing the hypothesis (at the 3% level of significance) that the average energy use has decreased from the past value of 16.7, what is the critical value? (please round your answer to 2 decimal places)