## 字幕表 動画を再生する

• - [Instructor] We're told that the weights

• of 11 different babies are recorded on the line plot below

• and we see there is one, two, three, four,

• five, six, seven, eight, nine,

• 10, 11 data points.

• Each one represents a different baby

• whose weight is recorded.

• Each weight was rounded to the nearest 1/8 of a pound.

• All right, then they ask us,

• what is the difference, in weight,

• between the two heaviest babies?

• So pause this video

• and try to figure that out

• before we work through it together.

• All right, now where are the two heaviest babies?

• So this one out here,

• this is the heaviest baby,

• and what is its weight?

• Well, let's see.

• Its weight is right over there,

• and what is that number or what is that weight?

• So this is nine and this is 10,

• and we have one, two, three, four,

• five, six, seven, eight equal spaces.

• So each of these is an eighth.

• So this is nine and one, two,

• nine and 2/8.

• So this one is, let me write this.

• This is nine and 2/8.

• Another way to think about it is,

• 2/8 is the same thing as 1/4,

• 'cause if you think about it,

• it's one, two, three, four equal spaces.

• This is also nine and 1/4 of the way to 10,

• so this is the same thing as nine and 1/4.

• And then what's the second heaviest babies?

• 'Cause we want the weight difference

• between the two heaviest.

• So the second heaviest baby is right over here

• and we know that it is eight and a half pounds.

• So what we really need to do is figure out

• what is the difference between nine and 2/8

• or nine and 1/4

• and eight and a half right over here?

• So we could set this up as a subtraction.

• This is going to be nine and,

• let's call it nine and 1/4,

• minus, minus eight and a half,

• and we can actually use this,

• this, these measurement scales

• or you can even view this as something

• of a number line

• The difference is this length right over here.

• And we could think about it in terms of eighths,

• 'cause each of these hash marks is an eighth,

• so 1/8, 2/8, 3/8, 4/8, 5/8 and 6/8.

• So this is equal to 6/8.

• We could also think about it in terms of fourths,

• so this is 1/4, 2/4, and 3/4.

• So this is equal to 3/4.

• So what's the difference in weight

• between the two heaviest babies?

• It is 3/4 of a pound.

- [Instructor] We're told that the weights

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A2 初級

# 線分プロットの解釈 (Interpreting line plots)

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林宜悉 に公開 2021 年 01 月 14 日