A sample of 80 commute distances is taken from a 3. Rolls-Bentley says "The average gas mileage in 2020 population with known standard deviation of 6.3 miles. Rolls-Bentleys is 36 mpg", Write the null and alternative The sample mean is 11.3 miles. Find the probability that hypothesis. the population mean is more than 12 miles. Hot 1. Write the distribution: X~ ( . ) Ha 4. Rolls-Bentley says less than 10% of high-speed collisions in their super safe cars result in serious injury. 2. P(up > 12) = Write the null and alternative hypothesis. Ho: Ha