Frequency & histograms cc-33

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Presentation transcript:

Frequency & histograms cc-33 OBJECTIVE: 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

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 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