Using Financial Information Instructions Imagine that you are the manager of Valley Skateboard Shop. The accountant for the business has delivered the news that sales are down by 15 percent compared to last month. She also reports that the rent on the building will be increasing next month by $100. You believe the shop needs a more experienced salesperson and that the building needs new paint and awnings. How might the information delivered by the accountant affect your decisions and course of action?

**week of test** no class friday**** limited notes** Extension of Topic 6: The Expected Value concept: the symbol “E” denotes the average value of hence: mu= E(x)=mean of x Variance of a Discrete Random Variable: (when x is a random variable) (sigma)^2=Variance of X= Var(x) (sigma)^2= sum of (xmu)^2 X P(x) P(x)= Probability of X since mu= E(x)= sum of x X P(x) Var(x)= (sigma)^2= sum of [xE(x)]^2 X P(x) Standard Deviation of a Discrete Random Variable: (the st. dev. of a random variable X is the pos. square root of the var of X) sigma= st.dev. of X= SD(x) SD(x)= sigma= sq. root of {sum of ([xE(x)]^2) P(x)}