Frequency & histograms cc-33OBJECTIVE: TO MAKE AND INTERPRET FREQUENCY TABLES AND HISTOGRAMS.

ANDRE TAPANES

AMANDA

DANIELA PARADA

KEVIN

VOCABULARY:

• FREQUENCY: THE NUMBER OF DATA VALUES IN AN INTERVAL.(HOW MANY TIMES THAT NUMBER APPEARS IN THAT RANGE OF NUMBERS)

• FREQUENCY TABLE: GROUPS A SET OF DATA VALUES INTO INTERVALS AND SHOWS THE FREQUENCY FOR EACH INTERVAL.

• HISTOGRAM: IS A GRAPH THAT CAN DISPLAY DATA FROM A FREQUENCY TABLE

• CUMALATIVE FREQUENCY TABLE: SHOWS A NUMBER OF DATA VALUES THAT LIE IN OR BELOW A GIVEN INTERVAL

NOTES:

• WHEN YOU’RE MAKING A FREQUENCY TABLE YOURE BASICALLY JUST GETTING THE NUMBERS THAT FALL INTO THE RANGE YOU CHOOSE(OR THAT WAS GIVEN TO YOU)

• EX: 150, 126, 139, 144, 125, 149, 133, 140, 142, 149, 150, 127, 130• STEP 1: ORDER THEM IN NUMERICAL ORDER.

125, 126,127, 130, 133, 139, 140, 142, 144, 149, 149, 150, 150.

• STEP 2: SET A RANGE OF NUMBERS TO ORDER

125-134 ; 135-144 ; 145- 154

NOTES:

125, 126,127, 130, 133, 139, 140, 142, 144, 149, 149, 150, 150.

STEP 3: MAKE THE CHART

• STEP 4: FILL IN THE BLANKS ACCORDING TO THE NUMBERS

RANGE FREQUENCY

125-134

135-144

145-154

RANGE FREQUENCY

125-134 5

135-144 4

145-154 4

Histogram Notes:

• KNOW- A set of data values.

• NEED- A histogram of the data values.

• PLAN- Make a frequency table. This will help you construct the histogram.

Practice:

• 1. The quiz scores earned by 20 students are listed below. What is a frequency table that represents the data?

9,8,5,8,10,3,6,7,6,7,8,10,8,5,7,9,7,8,4,9

Answer:

SCORE FREQUENCY

1-2 0

3-4 2

5-6 4

7-8 9

9-10 5

INTERACTIVE PROBLEMS:

• 1. 135, 211, 220, 180, 175, 161, 246, 201, 192, 167, 235, 208

NEW ACTIVITY

• 108, 90, 96, 150, 120, 115, 135, 126, 165, 155, 130, 125, 100

GRAPH THIS!

• 150, 126, 139, 144, 125, 149, 133, 140, 142, 149, 150, 127, 130