# Collecting & Displaying Data

## Mathematics, Grade 4

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Tables Collecting data You can collect data (information) from other people using polls and surveys. Scientists collect data from experiments. Tables and graphs help us organize and interpret collected information. The mean is the average of a set of numbers. To find the mean, add all the numbers in the set and divide the sum by the number of items in the set. The median is the middle number when the data are in numerical order. The mode is the number that occurs most often in a set of data. Bike Color No. of Gears Price Ranger Outdoor Tourist Starburst Mountain Silver 5 10 \$240 \$295 \$325 12 \$375 \$225 15 6 Blue Red Black White Types of Bikes Sold at the Bike Shop Mean Median Mode 20 ÷ 5 = 4 The mean is 4 The median is 6 The mode is 5 2, 3, 3, 6, 8, 10, 12 3, 5, 5, 5, 6, 6, 8, 9 middle number Frequency Table A frequency table shows the totals of the tally marks. A bar graph is one way of showing data that can be counted. Each segment in a circle graph represents a fraction of a set of data. A line graph presents a set of data collected over time using line segments. Months Months Number of bikes sold Number of Bikes A stem-and-leaf plot shows data arranged by place value. 3 + 5 + 2 + 6 + 4 Line Graph Circle Graph Bar Graph Stem–and–Leaf Plot Ranger Bike Tally Total Outdoor Tourist Starburst Mountain RangerOutdoorT ourist Starburst Mountain 0 1 2 3 4 5 6 7 8 9 10 Total 20 10 2 1 4 3 10 20 30 40 50 60 10 20 30 40 50 60 January F ebruaryM ar ch M ay A pril June July A ugust 15, 20, 28, 31, 35, 46, 49, 52 (arranged from least to greatest) Stem (tens digit) Leaf (ones digit) Mountain (10 bikes) 5 08 15 69 2 1 2 3 4 5 Outdoor (4 bikes) Ranger (3 bikes) Starburst Tourist(1 bike) To find the number of gears of the Starburst bike, look across the Starburst row until it meets the Gear column. The headings tell us what data is in each column. The title tells us what the table is about. Height of the bars shows how many of each bike sold (2 bikes) © Copyright NewPath Learning. All Rights Reserved. 93-4501 www.newpathlearning.com Collecting & Displaying Data
\|xiBAHBDy01641qzZ Tables The is the average of a set of numbers. To find the mean, add all the numbers in the set and divide the sum by the number of items in the set. The median is the when the data are in numerical order. The mode is the number that occurs in a set of data. Bike Color No. of Gears Price Ranger Outdoor Tourist Starburst Mountain Silver 5 10 \$240 \$295 \$325 12 \$375 \$225 15 6 Blue Red Black White Types of Bikes Sold at the Bike Shop Mean Median Mode ÷ = The mean is 4 The median is 6 The mode is 5 2, 3, 3, 6, 8, 10, 12 3, 5, 5, 5, 6, 6, 8, 9 middle number Frequency Table A frequency table shows the totals of the tally marks. A bar graph is one way of showing data that can be counted. Each segment in a circle graph represents a fraction of a set of data. A line graph presents a set of data collected over time using line segments. Months Number of bikes sold Number of Bikes A stem-and-leaf plot shows data arranged by place value. 3 + 5 + 2 + 6 + 4 Key Vocabulary Terms bar graph circle graph column data frequency table graph heading line graph mean median mode poll stem-and-leaf plot survey table title Line Graph Circle Graph Bar Graph Stem–and–Leaf Plot Ranger Bike Tally Total Outdoor Tourist Starburst Mountain RangerOutdoorT ourist Starburst Mountain 0 1 2 3 4 5 6 7 8 9 10 Total 10 20 30 40 50 60 January F ebruaryM ar ch M ay A pril June July A ugust 15, 20, 28, 31, 35, 46, 49, 52 (arranged from least to greatest) Stem (tens digit) Leaf (ones digit) To find the number of gears of the Starburst bike, look across the Starburst row until it meets the Gear column. The headings tell us what data is in each column. The tells us what the table is about. © Copyright NewPath Learning. All Rights Reserved. 93-4501 www.newpathlearning.com Collecting & Displaying Data