To find the mean number of hours spent outside for the kids surveyed, we need to add up all the hours and then divide by the total number of kids surveyed.
Sum of all hours:
0 + 10 + 15 + 4 + 70 + 15 + 18 + 20 + 6 + 8 + 10 + 12 + 15 + 18 + 20 + 2 + 50 + 40 + 10 = 318
Total number of kids surveyed: 19
Mean number of hours spent outside: 318 / 19 ≈ 16.74
Therefore, the mean number of hours spent outside for the kids she surveyed is approximately 16.74 hours.