Mean, Median, Mode and
Standard Deviation
(Section 11-1)
Essential Question: How do you calculate the variance and standard deviation?
Students will write a summary describing how to calculate the standard deviation and variance of a data set.
Statistics: Numerical values used to summarize and compare sets of data
Measure of central tendency: A number used to represent the center or middle of
a set of data values.
Essential Question: How do you calculate the variance and standard deviation?
Students will write a summary describing how to calculate the standard deviation and variance of a data set.
Example1 Below are the intervals (in minutes)
between eruptions of the Old Faithful geyser in
Yellowstone National Park. Calculate the mean,
median, and mode for the dataset:
98 92 95 87 96 90 65 92 95 93 98 94
Essential Question: How do you calculate the variance and standard deviation?
Students will write a summary describing how to calculate the standard deviation and variance of a data set.
Essential Question: How do you calculate the variance and standard deviation?
Students will write a summary describing how to calculate the standard deviation and variance of a data set.
Measure of dispersion: A statistic that tells you how dispersed, or spread out, data
values are
Range: The difference between the greatest and least data values.
Essential Question: How do you calculate the variance and standard deviation?
Students will write a summary describing how to calculate the standard deviation and variance of a data set.
Essential Question: How do you calculate the variance and standard deviation?
Students will write a summary describing how to calculate the standard deviation and variance of a data set.
Standard deviation: A measure that describes the typical difference (or deviation)
between a data value and the mean
Variance: The average (mean) of the squared differences from the Mean
Essential Question: How do you calculate the variance and standard deviation?
Students will write a summary describing how to calculate the standard deviation and variance of a data set.
Essential Question: How do you calculate the variance and standard deviation?
Students will write a summary describing how to calculate the standard deviation and variance of a data set.
Essential Question: How do you calculate the variance and standard deviation?
Students will write a summary describing how to calculate the standard deviation and variance of a data set.
Essential Question: How do you calculate the variance and standard deviation?
Students will write a summary describing how to calculate the standard deviation and variance of a data set.
Essential Question: How do you calculate the variance and standard deviation?
Students will write a summary describing how to calculate the standard deviation and variance of a data set.
HW #____ Practice WS 11-1
Essential Question: How do you calculate the variance and standard deviation?
Students will write a summary describing how to calculate the standard deviation and variance of a data set.