Statistics Flashcards
Revise the basics of the statistics section
How do you calculate the Interquartile Range?
Upper quartile take away Lower quartile
What do you list in the columns of a table to find the standard deviation?
x, x-xbar, (x-xbar)2
What does the symbol Σ (sigma) mean?
Add together all the numbers
What does the symbol 𝑥 (x bar) mean?
The mean
In the standard deviation formula, what does n
How many numbers there are
If the standard deviation is higher, what comment can you make?
The numbers are more varied
If the semi-interquartile range is higher, what comment can you make?
The numbers are more varied
If the mean or median is higher, what comment can you make?
On average , the numbers are higher
If the standard deviation is lower, what comment can you make?
The numbers are more consistent
If the semi-interquartile range is lower, what comment can you make?
The numbers are more consistent
If the mean or median is lower, what comment can you make?
On average, the numbers are lower
What five values are shown by a boxplot?
Lowest, Lower Quartile, Median, Upper Quartile, Highest
How do you find an angle in a pie chart?
360 ÷ Total × Frequency
How do you find the quartiles?
Put the list in order and split it into four equal groups
