3,2,0,13,21,0,3,31,15,3,15,7,10,4, 17,6,14,5
mean
median
mode
Range
Variance
Standard
Devation

Solve the following pair of equations for x and y: ax/b_ by /a= a +b; ax - by = 2ab

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

Can anyone explain to me how to do this? anything will .