26 Mastering the Calculator using the Sharp EL-531LH
IMPORTANT: Before starting any computations always clear the statistic’s memories using
I will use the data set A (–5, 2, 3, 4, 11) to demonstrate the use of the calculator.
Step 1: Input the observations.
Use the key to input data (no need to press ).
Step 2: Check that the correct number of observations have been inputted. The screen should
show n = 5.
Or press
The display should read n = 5.
Step 3: To display the mean press
and the display should read 3
Step 4: Display the standard deviation (assume the data set is a sample) press
and the display should read 5.7008771
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Example
Use your calculator to find the mean, standard deviation and variance for data set B: –18, 1, 3,
9, 20.
(the variance is the square of the standard deviation)
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