Obj: Read and interpret data displayed in a histogram

Warm-up

Obj: Read and interpret data displayed in a histogram

Histograms – 1.4

Objective

• Read and interpret data displayed in a histogram.

Obj: Read and interpret data displayed in a histogram

Obj: Read and interpret data displayed in a histogram

Bar Graphs Vs. Histograms

• Topics vs. numbers• Bars don’t touch vs. bars do touch

Obj: Read and interpret data displayed in a histogram

Definition

• Bin Width – The # you count by on the x-axis.

• Insert pic

Obj: Read and interpret data displayed in a histogram

Example 1• How many values

are in the data set?

• What is the bin width?

• How many trees are under 70 feet high?

• How many trees are between 70 and 80 feet high?

Obj: Read and interpret data displayed in a histogram

Example 2

• Draw a histogram of the data below using 5 bins:

(1, 6, 8, 8, 10, 11, 12, 13, 20, 22, 22, 25)

• Now make a histogram using only 3 bins:

Obj: Read and interpret data displayed in a histogram

Example 3• How many students took

the test?

• How many students scored less than 60%?

• How many students scored over 60% but less than 80%?

Obj: Read and interpret data displayed in a histogram

Homework

• 1.4 worksheet• Problems 1, 2, 4a