K={(2, 1), (3, 2), (4, 1), (5,3)} Is K-1 a function and why? No, each element in the domain does not have one range value.

Yes, each element in the domain has only one range value.

No, we don't know the original function and therefore can't make the determination.

Yes, each element in the range has only one domain value.

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