Takes numerical values for which it makes sense to find an average
Table of counts
Relative Frequency Table
- Label axes - Title graph - Scale axes appropriately - Each bar should correspond to the appropriate count - Leave room between bars
- Include all the categories that make up the whole - Counts will be percentages
Measures of Center
- Most common measure of center - Arithmetic average
- Midpoint of a distribution
The middle 50%
Q3 - Q1
Less than Q1 - 1.5IQR Higher than Q3 + 1.5IQR
- Only need to properly label horizontal axis - Title - Each dot represents a count of 1 - Works well with a small data set
- Separate each piece of data into a "stem" and a "lead" - Write the stems vertically in increasing order from top to bottom - Write the leaves in increasing order out from the stem - Be very neat and leave the same amount of space between leaves - Title the graph - Include a key identifying what the stem and leaves represent - Works well with a small data set
- Most common graph of a quantitative variable - The x-axis is continuous, no gaps between bars - Title the graph - Divide the range of data into classes of equal width - Label and scale the axes
Minimum, Q1, Median, Q3, Maximum
- Drawn from Q1 to Q3 - Line in the middle marks the median - Lines extend from the box to the smallest and largest observations that aren't outliers
- Find the distance of each observation from the mean - Square each of these distances - Average the distances by dividing their sum by n-1 - Take the square roon
The error from rounding decimals
When describing the overall pattern of a distribution, you must address...
- Center - Shape - Spread - Outliers
Relative Frequency Table
Segmented Bar Graph
Is the mean sensitive to outliers?
The mean is sensitive to outliers.
If a distribution is skewed, use this measure of center
Is the median sensitive to outliers?
The median is not sensitive to outliers.
If a distribution is exactly symmetric, the median and mean will be
Exactly the same
If the distribution is skewed left, the mean will
Fall to the left
If the distribution is skewed right, the mean will
Fall to the right
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AP Statistics Chapter 1
Chapter 4: Displaying and Summarizing Quantitative Data
AP Statistics: Chapter 1
OTHER SETS BY THIS CREATOR
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Sine and Cosine of Unit Circle
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THIS SET IS OFTEN IN FOLDERS WITH...
AP Statistics Chapter 2
AP Statistics Chapter 3
AP Statistics - Chapter 4
AP Statistics Chapter 5
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