Our environment is very sensitive to the amount of ozone in the upper atmosphere. The level of ozone normally found is 5.5 parts
/million (ppm). A researcher believes that the current ozone level is not at a normal level. The mean of 31 samples is 5.2 ppm with a standard deviation of 1.0. Assume the population is normally distributed. A level of significance of 0.01 will be used. State the null and alternative hypotheses.
