Statistics

Statistics

In our Statistics unit we will be learning about line plots and line graphs.  We will also be learning how to interpret data by looking for clumps, holes, outliers, and the range, median, mode, and mean of data.

  Statistics is a type of mathematics used to collect, organize, and display data for people to understand.  Data are facts or information about people or things.

  Line graphs show increases and decreases in a trend. 

  Line plots are a portion of a number line used as a quick way to organize and represent data as it is collected.

  A clump is a group of data pieces on the graph.   The clump of the line plot is 0 – 4.

 A hole is a place where there are no data pieces. The holes are at 5, 7, 9, 11, 12 and 15.

 Outliers are pieces of data that are much larger or smaller than the rest of the data. The outliers are 13 or 14.

 The mean is the total of the numbers divided by how many numbers there are.

1.   Add up all the numbers: 7+ 9 + 11 + 6 + 13 + 6 + 6 + 3 + 11 = 72

2.   Divide the answer by how many numbers there are: 72 divided by 9 = 8.

3.   The mean is 8.

 The median is the middle value.

1.   Put the numbers in order: 3   6   6   6   7   9   11   11   13

2.   The number in the middle of the list is the median: 7.

3.   If there are two middle values, the median is halfway between them:

          3   6   6   6   7   8   9   11   11   13 – The median is 7.5

 The mode is the value that appears the most.

1.   Put the numbers in order: 3   6   6   6   7   9   11   11   13

2.   Look for the number that appears the most: 6.

 The range is the difference between the biggest and the smallest number.

1.   Put the numbers in order: 3   6   6   6   7   9   11   11   13

2.   Subtract the smallest number from the biggest number: 13 – 3 = 10

3.   The range is 10.

 To practice making graphs.  

 To practice interpreting data.

 To practice line graphs. 

  To learn more about line plots.

 To practice mode, median, mean.  

   To practice reading a graph.

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