Warm-up (independent, level 0 noise): Please complete this in your journal below the CQ 1. If I give my son $12.35 each week in allowance, how much will he have in his wallet after 8 weeks? He already has $24.75 in his wallet at this time. Warm-up (independent, level 0 noise): Please complete this in your journal below the CQ 1. If I give my son $12.35 each week in allowance, how much will he have in his wallet after 8 weeks? He already has $24.75 in his wallet at this time. Challenge Question: How can you decide which graph best represents certain types of data? Directions: Please come in and get your journal. On your next blank page, write today’s date on the top line. Title this page ~ Measures of Central Tendencies and Graphs. Below the date, write the Challenge Question.

Mean Mean means Average  Step 1 – Add all the numbers. 8, 10, 12, 18, 22, = 96

 Step 2 – Divide the sum by the # of numbers. 6)6) 96 sum# of addends

The mean or average of these numbers is 16. 8, 10, 12, 18, 22, 26

Median Median is in the Middle  Median  Median – the middle number in a set of ordered numbers. 1, 3, 7, 10, 13 Median = 7

 Step 1 – Arrange the numbers in order from least to greatest. 21, 18, 24, 19, 27 18, 19, 21, 24, 27

 Step 2 – Find the middle number. 21, 18, 24, 19, 27 18, 19, 21, 24, 27 This is your median number.

 Step 3 – If there are two middle numbers, find the mean of these two numbers. 18, 19, 21, 25, 27, 28

 Step 3 – If there are two middle numbers, find the mean of these two numbers = 46 2)2) 23 median

29, 8, 4, 11, , 8, 11, 19, 29

31, 7, 2, 12, 14, , 7, 12, 14, 19, = 26 2)2)

1, 3, 7, 10, 13 Mode = 1 MOde MOde occurs the MOst

 Step 1 – Arrange the numbers in order from least to greatest. 21, 18, 24, 19, 18 18, 19, 21, 24

 Step 2 – Find the number that is repeated the most. 21, 18, 24, 19, 18 18, 18, 19, 21, 24

29, 8, 4, 8, , 8, 19, 29

 Range  Range – the difference between the greatest and the least value in a set of numbers. 1, 3, 7, 10, 13 Range = 12

 Step 1 – Arrange the numbers in order from least to greatest. 21, 18, 24, 19, 27 18, 19, 21, 24, 27

 Step 2 – Find the lowest and highest numbers. 21, 18, 24, 19, 27 18, 19, 21, 24, 27

 Step 3 – Find the difference between these 2 numbers. 18, 19, 21, 24, – 18 = 9 The range is 9

29, 8, 4, 8, – 4 = 25 4, 8, 19, 29

 Bar graph  Line plot  Line graph  Circle graph  Venn diagram  Stem-and-Leaf plot

A bar graph is a chart that uses bars to symbolize the quantity of something. Choir

 A line plot shows data on a number line with x or other marks to show frequency. The line plot below shows the test scores of 26 students

A graph that uses points connected by lines to show how something changes in value (as time goes by, or as something else happens).

 A pie chart is a circular chart divided into sectors, each sector shows the relative size of each value.

 a diagram that uses overlapping circles to show collections of mathematical elements and what they have in common.

A plot where each data value is split into a "leaf" (usually the last digit) and a "stem" (the other digits).