FREQUENCY TABLES AND LINE GRAPHS CONFIDENTIAL

FREQUENCY TABLES CONFIDENTIAL

Review Arrange the following numbers in ascending order: Arrange the following numbers in descending order: a) 90,75,80,65,78,55,56, 77,86,68,74,79,91 CONFIDENTIAL

FREQUENCY TABLES A frequency table is a table that lists each item in a data set with the number of times the item occurs. CONFIDENTIAL

We use tally marks to represent the number of repeated items. Frequency tables We use tally marks to represent the number of repeated items. Tally mark is denoted by a vertical line For example: 3 = and 5 = CONFIDENTIAL

Frequency tables square triangle circle Triangles Shapes Shapes Tally The frequency table is: Shapes Tally Number Triangle III 3 Square IIII 4 Circle II 2 CONFIDENTIAL

Frequency tables ∆ ○⌂ ⌂ ∆□ ∆○ ∆ ⌂ ○∆ ⌂○ □∆ ⌂□ ∆□○ ⌂ ○∆ ⌂ □ □∆ ○○□ EXAMPLE: Shapes Tally frequency Circle IIII IIII 9 pentagon 10 Square IIII IIII I 11 Triangle ∆ ○⌂ ⌂ ∆□ ∆○ ∆ ⌂ ○∆ ⌂○ □∆ ⌂□ ∆□○ ⌂ ○∆ ⌂ □ □∆ ○○□ ∆ ⌂ □ □ □ ⌂ ⌂○ □ Total 40 CONFIDENTIAL

The salary of 24 people in my neighborhood (in $ thousands): Now your turn!!! The salary of 24 people in my neighborhood (in $ thousands): 25 26 30 25 26 28 28 28 28 25 25 30 30 25 30 30 28 25 30 27 30 29 29 28 Using tally marks, make a frequency distribution table. CONFIDENTIAL

Monday Tuesday Wednesday Thursday Friday More Problems The following table shows the number of TV’s sold by a shopkeeper during a week. Prepare a frequency table. Friday Thursday Wednesday Tuesday Monday CONFIDENTIAL

LINE GRAPHS CONFIDENTIAL

Line Graphs A line graph uses a series of line segment to show changes in data. CONFIDENTIAL

Making a Line graph Temperatures through out the day Time Temperature 8 A.M 50 F 10 A.M 60 F 12 P.M 70 F 2 P.M 80 F 4 P.M 75 F 6 P.M 8 P.M 55 F 80 TEMPERATURE 75 70 65 60 55 50 8 AM 10AM 12PM 2 PM 4 PM 6 PM 8 PM TIME OF DAY CONFIDENTIAL

More Examples Fruit Numbers Apple 9 Orange 4 Mango 15 Pear 13 Convert the frequency table into a line graph: 15 N U M B E R S Fruit Numbers Apple 9 Orange 4 Mango 15 Pear 13 13 11 9 7 5 Apple Orange Mango Pear Fruits CONFIDENTIAL

Solve the puzzle http://www.thekidzpage.com/onlinejigsawpuzzles/kids-jigsaw-puzzles/12-piece-jigsaw/12-27-06-puppydog.html CONFIDENTIAL

Time for a break! CONFIDENTIAL

Now your turn Convert the given frequency table into line graph Snack Numbers Sandwich 15 Chips 26 Samosa Cake 7 CONFIDENTIAL

More practice problems Prepare a frequency table and then draw a line graph with this observations: 145, 150, 142, 144, 147, 150, 148,147,149,151, 149, 144, 150, 146,148,150,149,144, 151, 148,147,146, 151,149,150,140,146,147,150,151. CONFIDENTIAL

Assignment The following table gives birth-days of 40 boys in a class. Illustrate the data by a line graph. Days sunday monday Tuesday Wednesday Thursday Friday Saturday Number of boys 6 7 3 8 11 2 CONFIDENTIAL

A line graph uses a series of line segments to show changes in data. Review A frequency table is a table that lists each item in a data set with the number of times that occurs. A line graph uses a series of line segments to show changes in data. CONFIDENTIAL

That’s all for today!!! You did a good job! CONFIDENTIAL