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# Statistics, Graphs and Examples - PowerPoint PPT Presentation

Statistics, Graphs and Examples. What you need to support your “must knows”. Measures of Central Tendency. Mean : Average; sum divided by number of measurements in a data set Median : Middle number in a data set Mode : Most frequently occurring number in a data set. X-Y Scatterplot.

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## PowerPoint Slideshow about ' Statistics, Graphs and Examples' - thina

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### Statistics, Graphs and Examples

What you need to support your

“must knows”

• Mean: Average; sum divided by number of measurements in a data set

• Median: Middle number in a data set

• Mode: Most frequently occurring number in a data set

• Graph used to determine the relationship between two variables

• Relationship may be positive, negative or non-existent

• Correlation does not mean causation!!!

• Histogram

• Graph used to show frequencies on the Y axis and characteristics on the X axis

• Used for discrete data

• Graph used to plot continuous data over time

• X axis contains timeline, Y axis shows frequencies

• Graph used to show percentage of a meaningful whole

• Fonts with serifs are easier to read in print

• Fonts sans serif are easier to read when projected

• Random is not the same as a sample

• Be suspicious of research sponsored by a product supplier

• Celebrities often know little about their causes

• Use data from careful research and sampling polls

• Telling stories is useful to provide a personal touch

• It’s OK to give Personal opinion

• Use Internet research from a credible site

• Journals are preferable to popular periodicals