Statistics (E) Flashcards
what is the mean?
The average value
How do you calculate the mean?
-Add all values
-divide the answer by the number of values
what is the median?
The number in the middle of all of the values
How do you calculate the median?
Place values from smallest to largest, the value in the middle is the median
What is the mode?
The most common value
How do you calculate the mode?
Place the values of the same amount together, the one value repeated the most is the mode
What is the range?
The difference from the smallest value to the largest value
How do you calculate the range?
Minus the smallest number from the largest number
What is the interquartile range?
A measure of the spread of the data around the median value
How do you calculate the interquartile range?
-Order the data from least to greatest.
-Find the median.
-Calculate the median of both the lower and upper half of the data.
-The Interquartile range is the difference between the upper and lower medians.
What is standard deviation?
A measure of the spread of the data around the mean.
How do you calculate standard deviation?
-Find the mean.
-For each data point, find the square of its distance to the mean.
-Sum the values from Step 2.
-Divide by the number of data points.
-Take the square root.
(use a table to calculate)
What is the spearman’s rank correlation?
A test to see if two sets of data link or are down to chance. You can see how much they correlate and whether there is a positive correlation or a negative one.
calculated using a table and equation
what is Chi Squared?
A test to see if there is any association between variables.
What is Man Whitney U?
To compare two samples that come from the same population and to test if two samples are equal or not
