1.3 Measures of Center
resistant
A statistic that is not affected by outliers
mean, trimmed mean, median
Put the following in order from least to most resistant: mean, median, trimmed mean
True
True or false: Unlike the mean, the median is a resistant measure of centers
True
True or false: x̅ is a statistic and μ is a parameter
Bimodal
a data set that has two different modes
weighted mean
a method of calculating the mean where some data points contribute more than others; commonly uses the frequency
Outlier
a number that has an extreme value when compare with most of the data
Percentile
a statistic that identifies the percentage of the data that is less than the given value
mean
numerical balancing point of a data set; average
Midrange (mid extreme)
the mean of the maximum and minimum values of a data set
n% trimmed mean
the mean that results from removing a fixed percentage of data (half of the percentage from each end)
trimmed mean
the mean that results from removing the maximum and minimum values
Median
the middle number in an ordered data set
Mode
the most frequently occurring number in a data set
Frequency
the number of times a data value occurs