what is mode?
the value that apears the most in the list
median is calulated...
for odd numbers its (n+1/2)th value
for even numbers its (n/2)th value and (n/2+1) value sumed and devided by two.
number of values
what is uncoded data?
unchanged version of data
what is modal class?
class with the majority of values
what is coded data?
data that was somehow changed,
like all values lowered for 5, or increased for 10
how is mean calculated for ungrouped data?
sum of x devided by n
What is ungrouped data?
data that does not appear in a table
how do standard deviation/varience vary for coded/uncoded data?
standard deviation/ varience are the same for coded and uncoded data
how is standard devitaion calculated for ungrouped data?
sum of x^2 devided by n - mean^2
what is variance?