Which elements in the set below are integers? 12, β3β4,β 25 , β7, β 5 , 14β7, 9 a. 12, β 25 , β7, 9 b. 12, β 25 , β7, 14β7, 9 c. β3β4, 25 , β 5 ,14β7 d. 12, β7, 9
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