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.

Agroup of student volunteers participates in a study designed to assess several behavioral interventions for improving output in a repetitive task. prior to the beginning of the study, all volunteers unknowingly observed, and their output is measured. at the beginning of the study, prior to any intervention, the volunteers perform the same task under the observation of a study administrator, and their overall output increases. which of the following terms describes this phenomenon? a. simpson's paradox b. hawthorne effect are d. novelty effect d. pygmalion effect e. observer-expectancy effect