There are approximately 7.5×10 to the 18 power grains of sand on earth. there are approximately 7×10 to the 27 power atoms in an average human body. are there more grains of sand on earth atoms in the human body? how do you know ?

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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