220 likes | 375 Views
FREQUENCY TABLES AND LINE GRAPHS. FREQUENCY TABLES. Review. Arrange the following numbers in ascending order: a) 145,140,150,149,142,147,141,146,151,148 Arrange the following numbers in descending order: a) 90,75,80,65,78,55,56, 77,86,68,74,79,91. FREQUENCY TABLES.
E N D
FREQUENCY TABLES AND LINE GRAPHS CONFIDENTIAL
FREQUENCY TABLES CONFIDENTIAL
Review • Arrange the following numbers in ascending order: a) 145,140,150,149,142,147,141,146,151,148 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
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
Shapes Triangles square circle square square triangle circle triangle square square Frequency tables The frequency table is: CONFIDENTIAL
EXAMPLE: Frequency tables • ∆ ○⌂ ⌂ ∆□ ∆○ ∆ ⌂ • ○∆ ⌂○ □∆ ⌂□ ∆□○ • ⌂ ○∆ ⌂ □ □∆ ○○□ • ∆ ⌂ □ □ □ ⌂ ⌂○ □ Total 40 CONFIDENTIAL
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. CONFIDENTIAL
LINE GRAPHS CONFIDENTIAL
Line Graphs • A line graphuses a series of line segment to show changes in data. CONFIDENTIAL
80 Making a Line graph 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 15 N U M B E R S 13 11 Convert the frequency table into a line graph: 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 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. CONFIDENTIAL
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