Our environment is very sensitive to the amount of ozone in the upper atmosphere. the level of ozone normally found is 7.2 parts/million (ppm). a researcher believes that the current ozone level is not at a normal level. the mean of 26 samples is 7.5 ppm with a standard deviation of 1.0 . assume the population is normally distributed. a level of significance of 0.05 will be used. find the p-value of the test statistic. you may write the p-value as a range using interval notation, or as a decimal value rounded to four decimal places.