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Frequency polygon
use midpoints, line graph, make sure each end of line is touching xaxis by adding more classes.

Frequency histogram
bar graph, use midpoints, bars are touching

Pareto Chart
bar graph, bars aren't touching because it isn't numerical data.

Empirical Rule
68, 95, 99.7


Standard Deviation
Square root ( )



Ogive (cumulative frequency graph)
use class boundaries (little bit below actual class) and cumulative frequency, line graph

Chebychev's theorem
= at least how many outcomes

Percentile
number of values below given value



defective units and what not
number of good C number of good wanted x number of bad C number of bad wanted.
For probability divide by number of total units C number of units wanted.

P(x)  binomial distribution
P(x) =

Mean given probability distribution
mean= Σ(x·p(x))

Standard deviation given probability distribution
square root (Σ((xmean)^2·P(x)))


mean binomial distribution
n · p

standard deviation binomial distribution
square root (n · p · q)

equation of regression line

correlation coefficient (r)
 1<0<1
 negative # means negative correlation
 positive # means positive correlation
 Closer the number is to zero the weaker the correlation.
 And the closer the number is to 1 or 1 the stronger the correlation

