Balance Sheet
Directions:
Read the narrative below. Then fill out the balance sheet on the following page to
discover if the companys assets balance out its liabilities and equity.
You own Company X. When you started the company, you initially invested $1
Math - Least squares regression lines
Calculation
This should always go through the point ( ,
=
=
The equation of a least square regression line is given by y = a + bx
b=
=
= x -
these are on pg 13 of the formula book
a= -b
your calculator can work these
Math - Confidence Intervals Notes
The z values for the given confidence intervals will either have to be learnt or can be
worked out using the % point table on pg 25
The formula is:
(zx , +zx )
where is the sample mean and will be given or can be found,
n
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
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 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 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 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 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