Measures of location Flashcards
What is the mean?
The average of the data?
How do you calculate the mean?
total of all values in a set of data/total number of pieces of data
What is the mode?
The value a group that appears most often in a set of data
What is the median?
The median is the middle value bring the data is arranged in order of size
What is the range?
A measure of how spread out the data is
What is the formula for the mean?
Σfx / Σf
What is the formula for the median?
1/2 * (Σf + 1)
What is the lower quartile?
Median of lower half of the data
What is the upper quartile?
Meaning of the upper half of the data
What is the interquartile range?
The difference between the upper quartile and the lower quartile
What is the formula for the lower quartile?
1/4 * (Σf+1)
What is the formula for the upper quartile?
3/4 * (Σf + 1)
What is an advantage of the mean?
It makes use of all the data
What is a disadvantage of the mean?
This is affected by extreme values
What is an advantage of the median?
Isn’t affected by extreme values
What is a disadvantage of the median?
It is not always a data value
What is an advantage of the mode?
It is not affected by extreme values
What is a disadvantage of the mode?
There may be no mode or more than one
What is an outlier?
An extreme value that lies outsidenthe overall patern of the data
What ar the general formulae for outliers?
Data less than: Lower Quartile -1.5 * Interquartile Range
Data greater than: Upper Quartile + 1.5 * Interquartile Range
How do you enter data into a calculator and get results from it?
MENU 6
1: 1-Variable
Enter results
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2: 1-Variable Calc
