(1) From your work place or your everyday life, find a variable that might follow normal distribution, and discuss

• (a) how can you test whether that variable follows normal distribution
• (b) how the theory about normal distribution can help you make decisions with regard to this variable and
• (c) what would be the mean and the standard deviation for this variable?

(2) Find the definitions for these terminologies we use in the book and the lecture. Use your own language to explain them. Which concepts do you still have difficulty understanding them?

• (a) frequency distribution
• (b) cumulative percentage
• (c) z score
• (d) and (both are Greek letters).