Create a histogram for Ozone level.

Calculate the variance and the standard deviation of Ozone

Get a subsample of data with no missing value for Ozone variable using na$.$omit$()$ function and name the new data as raw$\_$no$\_$NA$.$ Feel free to copy, paste, and run the following code to your script: raw$\_$no$\_$NA $<-$ na$.$omit$($insert the name of your data$).$ You can read for details about the omit functionLinks to an external site..