This is due in 10 min helppp asap

Answer! if you don’t mind, can you explain

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

Alex measured the length of an item to be 3.7 cm. the actual length is 3.5 cm. what is alex’s percent error?