A histogram sorts data into number ranges (bins) and shows how many fall in each as a bar. So you need to be warm at counting/tallying, reading a bar's height, adding the counts, and telling which range a number belongs in.
Answer these 3, then press Show my path. No grade — this just points you to the right level.
1. Which numbers fall in the range 10–19?
2. A bar reaches up to the line marked 4. How many does that bar count?
3. Bars count 2, 3, and 1. What is the total?
A histogram groups data into equal ranges called bins (like 0–9, 10–19). Each bar's height tells how many values landed in that range. Read the height, and add the heights for the total.
Your quick check picks one for you, but you can switch any time:
Level 0 Read one bar at a time.
A. A bar reaches the line marked 3. How many does it count?
Read the height: the bar tops out at 3.
B. Another bar reaches 2. How many does it count?
The bar tops out at 2.
C. Add the two bars: 3 + 2 = ___
3 + 2 = 5.
Level 1 Sort numbers into bins, then count.
A. Which bin does the value 8 go in?
8 is between 0 and 9.
B. Three bars count 4, 2, and 3. What is the total number of values?
4 + 2 = 6, then 6 + 3 = 9.
Level 2 Build counts from data.
A. These values are 0–9: 3, 5, 8, 1. How many values are in the 0–9 bin?
Count them: 3, 5, 8, 1 → that's 4 values.
B. Histogram bars: 2, 4, 6, 3. What is the total number of values?
2 + 4 = 6, + 6 = 12, + 3 = 15.
1. Which bin does the value 23 belong in?
23 is between 20 and 29.
2. Histogram bars count 5, 1, 4. What is the total?
5 + 1 = 6, then 6 + 4 = 10.
You've practiced exactly what Lesson 8-6 uses. Time to dive in.
Start Lesson 8-6 →