when ever the blue line is not all the way on a number will it allways be 5?

On the Khan Academy practice shown, yes, because they're counting by tens on the y-axis scale and the bars in between are always exactly half way in between. In other situations, though, not always. You have to look carefully at the bar and the y-axis scale to see where the bar is and what they're counting by.

At 0:38 Sal said 80 and 85. what is the answer?

85. He's not really saying 80, he's just hesitating a bit the first time and starts over saying 85. Looks like 80... like 85.

What is the difference between "bar chart" and "bar graph"?

they're the same thing, just different names :)

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Class 7 (Old)

Course: Class 7 (Old) > Unit 3

Lesson 2: Use of bar graphs

Reading bar charts: comparing two sets of data

Name: Reading bar charts: comparing two sets of data
Uploaded: 2013-07-06T00:04:59Z
Description: A bar chart is especially useful with comparing two sets of data. The difference in the bars give us a quick snapshot that allows us to draw some conclusions.

Google Classroom

A bar chart is especially useful with comparing two sets of data. The difference in the bars give us a quick snapshot that allows us to draw some conclusions. Created by Sal Khan.

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Inga8
Posted 10 years ago. Direct link to Inga8's post “At 0:38 Sal said 80 and ...”
At
0:38
Sal said 80 and 85. what is the answer?
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(3 votes)
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- Sid
  Posted 10 years ago. Direct link to Sid's post “85. He's not really sayi...”
  85. He's not really saying 80, he's just hesitating a bit the first time and starts over saying 85. Looks like 80... like 85.
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  (22 votes)
zoe
Posted 10 years ago. Direct link to zoe's post “when ever the blue line i...”
when ever the blue line is not all the way on a number will it allways be 5?
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(4 votes)
Answer
- Ali Greene
  Posted 10 years ago. Direct link to Ali Greene's post “On the Khan Academy pract...”
  On the Khan Academy practice shown, yes, because they're counting by tens on the y-axis scale and the bars in between are always exactly half way in between.
  
  In other situations, though, not always. You have to look carefully at the bar and the y-axis scale to see where the bar is and what they're counting by.
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  (5 votes)
Qasim Hashmi
Posted 7 months ago. Direct link to Qasim Hashmi's post “What is the difference be...”
What is the difference between "bar chart" and "bar graph"?
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(2 votes)
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- Grace
  Posted 7 months ago. Direct link to Grace's post “they're the same thing, j...”
  they're the same thing, just different names :)
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  (4 votes)
bonnieplozza
Posted a year ago. Direct link to bonnieplozza's post “Why do I get more energy ...”
Why do I get more energy points from watching a video than from answering 7 questions right?
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(3 votes)
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sakib.hasanredwan123
Posted 3 months ago. Direct link to sakib.hasanredwan123's post “which website are u using...”
which website are u using for bar-chart in this video?
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nguyen, Tim
Posted 4 years ago. Direct link to nguyen, Tim's post “I think you cut the numbe...”
I think you cut the numbers in hkf
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sam gregg
Posted 10 years ago. Direct link to sam gregg's post “what if the bar is in be...”
what if the bar is in between the line
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- DaviRobe86
  Posted 10 years ago. Direct link to DaviRobe86's post “If the bar ends between t...”
  If the bar ends between two lines you just estimate where it ends. In the example on the video they all end halfway between the two numbers, making it 5 points more than lower of the two numbers.
  Comment on DaviRobe86's post “If the bar ends between t...”
  (1 vote)
Cervantes, 10R311!
Posted 8 years ago. Direct link to Cervantes, 10R311!'s post “At 0:32 it says about 75 ...”
At
0:32
it says about 75 points. I tried to guess the amount of points in Reading bar charts 2 and I said I said it looked like 42 but it said I was wrong. How am I supposed to know the exact amount?
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(1 vote)
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- Audrey Zuo
  Posted 6 months ago. Direct link to Audrey Zuo's post “Jus guess”
  Jus guess
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  (1 vote)
ERNEST FOSU
Posted 6 years ago. Direct link to ERNEST FOSU's post “This seem like a practice...”
This seem like a practice video ,where can I learn statistics from the basic level to the most advance level on this website
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(1 vote)
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Bailey Bessette
Posted 9 years ago. Direct link to Bailey Bessette's post “why does there have to be...”
why does there have to be 6 things why can't it just be less than 6
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(1 vote)
Answer

Video transcript

So we have this bar chart here. This says Scores on Midterm and Final Exams. So this axis, the vertical axis, is the scores. And then it's by student. And the blue bar is the midterm, and the yellow bar is the final. And the question they ask us is by how many points did Nadia's score improve from the mid-term to the final exam? So let's look at Nadia. So this is who we're talking about-- Nadia. And we care about how many points did she improve from the midterm to the final. Midterm is blue, final is yellow. So on the midterm, it looks like she scored-- and if I were to eyeball it, it looks like 75 points. And on the final, it looks like she scored 80. It looks like she scored 85 points. So it looks like her score improved by 10 points, so 10 points. Let's try one more. How many students improved their scores from the midterm to the final exam? So to improve from the midterm to the final, that means that the yellow bar for a given student, which is the final, is going to be higher than the midterm bar. That's the only way you can improve from the midterm to the final. So Brandon improved from the midterm to the final. Vanessa improved from the midterm to the final. Daniel improved from the midterm to the final. Kevin improved from the midterm to the final. William got a lower score on the final than the midterm, so he did not improve. So the number of students that improved their scores from midterm to final are one, two, three four students, so 4 students.