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# Reading stem and leaf plots

AP.STATS:
UNC‑1 (EU)
,
UNC‑1.G (LO)
,
UNC‑1.G.2 (EK)

## Video transcript

the government created the following stem-and-leaf plot showing the number of Turtles at each major zoo in the country how many's you zoos have fewer than 46 Turtles so what the stumped stem-and-leaf prop plot does is it gives us the first digit in each number and essentially you could say call this the tens place and then it gives us the ones place so there was only one zoo that had four turtles so that you could view this is zero zero four or four turtles then there's the sea so the everything here the tens place is of one so this this number right over here is really an 11 this is a 14 this right over here would be a 16 that's a 16 and so forth and so on this would be 17 18 all of this this is 23 this is 23 this is 26 because we have our tens place right over here this is the first digit so let's go ahead answer the question how many zoos had fewer than 46 Turtles so there are no zoos that had 40 anything Turtles and so all of these zoos here so all of these had 30-something Turtles does these had 20-something Turtles these have in the teens this have single digits so it's literally as many zoos if we have listed here so 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 17 zoos have fewer than 46 turtles let's do another one the buyer for a chain of supermarkets created the following stem-and-leaf plot showing the number of coconuts at each of the stores what was the smallest number of coconuts at any one grocery store so the buyer for chain of supermarkets created the following stem of leaf plots showing the number of coconuts at each of the stores so at any one grocery store the smallest number well that's this one right over here and remember it's not two we have our tens places right over here to one so this right over here represents twelve coconuts at that store so we'll put 12 right over here let's try it out another one a statistician for a chain of department stores created the following stem-and-leaf plot showing the number of watches at each of the stores how many department stores have exactly seven watches well that's only this one right over here 0-7 watches this one right this this and that one are not seven this is representing 17 because it's in the row with one at the beginning this right over here represents 27 so because it's in the row with the two at the beginning so there's only one store that has exactly seven watches let's do one more this is kind of fun a zookeeper created the following stem-and-leaf plot showing the number of tigers at each major zoo in the country how many zoos have more than 24 tigers so we can ignore the zeros and the teens and we get in the 20s this is 25 so that meets the criteria and then you go to 28 29 so all of these all of these in the 30s and all of these right over here this 3-0 this doesn't mean zero tigers this is 30 tigers this is 40 Tigers so we count 1 2 3 4 5 6 7 8 9 9 zoos have more than 24 tigers 9 zoos and we're done