Question

The director of a local Parks and Recreation department is interested in the number of hours kids spend outside each week. She surveys a group of 19 kids in her town and asks them how many hours they spent outside last week. Her results follow.

{0,10,15,4,70,15,18,20,6,8,10,12,15,18,20,2,35,40,10}


The director decides to remove the data value “70” since it is a lot larger than the rest of the data values. Calculate the mean of the original dataset and the mean of the new dataset after “70” is removed. Round your answers to one decimal place.

(1 point)

Answer 1

Sum of all 19 values = 328, so mean = 328/19 = 17.263... → 17.3 hours.

Sum without 70 = 258 (18 values), so mean = 258/18 = 14.333... → 14.3 hours.