0 / 2.5 pts Incorrect Question 28 The table below has gas prices per gallon from two different gas companies taken from 9 pairs of stations in 9 different regions of the country (one station from each company from each region). What are the appropriate null and alternative hypothesis for a two-tailed test that should be used to determine if the average price charged by one company is different than the average price charged by the other company? What is the absolute value of the test statistic (or calculated statistic)? The companies are named 'AAAA' and 'BBBB', and regions are numbered from 100 to 900. Rgn | AAAA | BBBB 100 | 3.81 | 2.36 200 | 2.22 | 1.14 300 | 1.55 | 2.98 400 | 3.75 | 1.56 500 | 1.89 | 1.25 600 | 3.27 | 2.97 700 | 2.61 | 3.82 800 | 2.31 | 2.90 900 | 2.93 | 3.78 Ho: mu_diff = 0; Ha: mu_diff not = 0; test stat = 0.4072 Ho: mu_AAAA = mu_BBBB; Ha: mu_AAAA not = mu_BBBB; test stat = 0.4072 Ho: mu_diff > = 0; Ha: mu_diff