Our environment is very sensitive to the amount of ozone in the upper atmosphere. The level of ozone normally found is 6.7 parts/million (pper). A researcher believes that the current arone level is not at a normal level. The mean at 61 samples 66.5 ppm with a standard deviation of 1.1. Assume the population is normally distributed, A level of significance of 0.05 will be used State the null and alternative hypotheses Answer Tables a Keypad Keyboard Shortcuts H