2Unit QuestionsDid you know that we probably use statistics such as mean, median, mode, and range without even noticing it?What is and how do we find the mean, mode, median, and range?Why should we learn these math concepts?
4Overview Today we will learn… MeanMedianModeRange
5What is Mean? The mean is the numerical average of a set of data. The mean is found by adding all the values in a set of data, then dividing the sum by the number of values.
6Let’s Try It… Lets find Dylan’s Science grade for his report card. 97 848810095637386Before we calculate the mean for this data, Can you give me a reasonable guess?How do you know your guess is reasonable?
7Remember the steps for finding the mean. Step 1- Add all the valuesStep 2- DivideStep 3- Find the Average
8Lets find Dylan’s MEAN science test score? 978488100Step 2Step 195Divide the sumby the numberof values.Add allthe values.6373867839÷+97The mean is 87783
9Think middle when you hear median. Sounds likeMEDIUMThink middle when you hear median.smallmediumlarge
10What is the MEDIAN? How do we find it? The MEDIAN is the number that is in the middle of a set of data.Steps for finding the median1. Arrange the numbers in the set in order from least to greatest.2. Then find the number that is in the middle.
1163 73 88 95 84 86 97 97 The median is 88. 100 Arrange values from least to greatest.6310073889597848697Find the number that is in the middle.The median is 88.Half the numbers areless than the median.Half the numbers aregreater than the median.
12What is the MODE? How do we find it? The MODE is the piece of data that occurs most frequently in the data set.A set of data can have:One modeMore than one modeNo mode
13The value 97 appears twice. Arranging values from least to greatestmakes it easier to find the mode.6310073889597848697Find the number that appears more or most frequently.The value 97 appears twice.All other numbers appear just once.97 is the MODE
14What is the RANGE? How do we find it? The RANGE is the difference between the lowest and highest values.largest numbersmallest number-RANGE
15What is the RANGE of this set of data? 86884899849771_ 99485151 is the range of this data set
16Now you try what we just learned Find the…. MedianMeanMode& Range