A deep sea diver attached to a safety cable was lowered into the water to a depth of 26.6 m. During the next hour the safety cable was let out 12.5 m, pulled in 8.6 m, and pulled in 35.2 m. At the end of the hour, what was the depth of the diver?

Ur environment is very sensitive to the amount of ozone in the upper atmosphere. the level of ozone normally found is 4.04.0 parts/million (ppm). a researcher believes that the current ozone level is not at a normal level. the mean of 2525 samples is 4.44.4 ppm with a standard deviation of 0.80.8. assume the population is normally distributed. a level of significance of 0.020.02 will be used. make the decision to reject or fail to reject the null hypothesis. answer tables