Are these ratios of hours online in a day (3:11 implies 3 out of 11 hours) online per day? That seems unlikely given how difficult comparisons like that would be to make.
That leaves the other option that these "hours" are actually hours and minutes (hours:minutes). But, that option is almost as bad simply because then the map subtitle has lied to us through omission in not mentioning minutes.
This map should have either just shown the number of total minutes or shown the hours in decimal rounded to a sane number of significant digits. Making a distinction of a minute or three amongst such broadly general averages of almost certainly guesstimated numbers self reported in a survey seems a poor choice.
Wait till they hear about the people farming, harvesting, and shipping the vegetables.