how do you know when a result is reasonable?
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How do you know when a result is reasonable?. Unit Questions. Did 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?. - PowerPoint PPT PresentationTRANSCRIPT
How do you know when How do you know when a result is reasonable?a result is reasonable?
How do you know when How do you know when a result is reasonable?a result is reasonable?
Unit Questions• Did 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?
Mean, Median, Mode, Mean, Median, Mode, RangeRange
Mean, Median, Mode, Mean, Median, Mode, RangeRange
ByByNikki GoodwinNikki Goodwin
OverviewToday we will learn…
• Mean• Median• Mode• Range
What 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.
Let’s Try It…• Lets find Dylan’s Science grade for
his report card.
97 84 88 100
95 63 73 86 97
Before we calculate the mean for this data, Can you give me a reasonable guess?How do you know your guess is
reasonable?
Remember the steps for finding the mean.
• Step 1- Add all the values• Step 2- Divide • Step 3- Find the Average
Lets find Dylan’s MEAN science test
score?
9784
73
88100
63
97
95
86+
783
783 ÷ 9
The mean is 87
MedianSounds like MEDIUM
Think middle when you hear median.
What 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 median
1. Arrange the numbers in the set in order from least to greatest.2. Then find the number that is in the middle.
978473 88 10063 979586
The median is 88.
Half the numbers are
less than the median. Half the numbers are
greater than the median.
What 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
978473 88 10063 979586
The value 97 appears twice.All other numbers appear just once.
97 is the MODE
What is the RANGE?How do we find it?
The RANGE is the difference between the lowest and highest values.
What is the RANGE of this set of data?
84
71
8899 48
97
86
_ 99
48
51
51 is the range of this data set
Now you try what we just learned Find the….
Websites
•Video on Mean, Median, Mode, and Range