Math Binomial Distribution Notes
A question is binomial if:
Probability of an event happening is given (p)
Number of people/trials/objects chosen given (n)
EQUALS or EXACTLY use the formula P(x=r)
Make sure you write it out with the values substituted in
Math Statistics Central Limit
Theorem and Regression
Central Limit Theorem (CLT)
You only need to use the central limit theorem if you are not told that the sample is
selected from a population which is Normally Distributed.
The theorem concerns the distr
Math Correlation Notes
The Product Moment Correlation Coefficient : is a numerical measures of the strength
and type of correlation denoted by r and will lie in the range -1 r 1
indicates how well the data, when plotted in a scatter graph, fits a straight
Math Normal Distribution Notes
FINDING PROBABILITIES
State the mean and variance (standard deviation)
Standardise to find the z value
Sketch a graph and shade in the area to represent the probability
Use the table to find the probability
o take care with
Math Probability and Linear Scaling
Linear scaling
If data values have been increased or decreased by a constant amount, the same will
happen to the mean. The standard deviation and variance will be unaffected.
If data values have been multiplied by a con
Math Statistics Notes (Mean,
averages, etc)
Mode : the most common or most popular data value
the only average that can be used for qualitative data
not suitable if the data values are very varied
Mean : important as it uses all the data values
Disadvanta