Boxplots and scatter diagrams

• Wiskunde
• Middelbare school
• havo
• Leerjaar 4

Boxplots and scatter diagrams

You need your Ipad and notebook

Recap

Give the mode.

Give the mode

Recap

Give the mode

Recap

The surface of the garden is 51 m2. Give the median.

Give the median.

Recap

Give the median

Today

Start (10 min)

New subject (20 min)

Bettermarks (15 min)

Tests (15 min)

Bettermarks (15 min)

End lesson (5 min)

Boxplot

3,6   4,8   7,6   8,3   5,5   5,4   9,2   5,2   6,7   6,0   5,3   4,8   6,3   7,0   6,7

Boxplot

3,6   4,8   7,6   8,3   5,5   5,4   9,2   5,2   6,7   6,0   5,3   4,8   6,3   7,0   6,7

3,6   4,8   4,8   5,2   5,3   5,4   5,5   6,0   6,3   6,7   6,7   7,0   7,6   8,3   9,2

Boxplot

3,6   4,8   7,6   8,3   5,5   5,4   9,2   5,2   6,7   6,0   5,3   4,8   6,3   7,0   6,7

3,6   4,8   4,8   5,2   5,3   5,4   5,5   6,0   6,3   6,7   6,7   7,0   7,6   8,3   9,2

Boxplot

3,6   4,8   7,6   8,3   5,5   5,4   9,2   5,2   6,7   6,0   5,3   4,8   6,3   7,0   6,7

3,6   4,8   4,8   5,2   5,3   5,4   5,5   6,0   6,3   6,7   6,7   7,0   7,6   8,3   9,2

Boxplot

3,6   4,8   7,6   8,3   5,5   5,4   9,2   5,2   6,7   6,0   5,3   4,8   6,3   7,0   6,7

3,6   4,8   4,8   5,2   5,3   5,4   5,5   6,0   6,3   6,7   6,7   7,0   7,6   8,3   9,2

Boxplot

Note: 14.3 Boxplot

Median (Q2)

Median of first half (Q1)

Median of second half (Q2)

Interquartile range (IQR) : Q3 – Q1

Range: Max – min 

Scatter diagram

Hours preparing

Grade

Scatter diagram

Hours of sport during the week

Weight 

Scatter diagram

Hair colour

IQ

Note Scatter diagram

Scatter Diagram: An effective way to see a relationship between data points.

Correlation: how closely the data points fit to a line.

Positive correlation

Negative correlation

No correlation

Note scatter diagram

Trend Line (line of best fit): A line that summarizes the data points. The line does not need to pass through any of the points.

Strong/weak: If most points are close to the trendline, the correlation is strong.

Sttong positive correlation

Weak positive correlation

Bettermarks

• Work on 14.3
  
• Until 11:00
• Raise your finger if you have any questions or when you're finished