The data shows the speed, in miles per hour, of motorists on a stretch of road. 50,36,52,32,55,49,37,35,40,19,38,34 ,51,49,52,55,54

Which is/are true about the data? Select all that apply.

19 miles per hour is an outlier

55 miles per hour is an outlier

The outlier decreases the mean speed

The outlier decreases the median speed

If the outlier were changed to 36 per hour, the standard deviation would increase

If the outlier were changed to 36 miles per hour the interquartile range would increase.