1. read each item below and select the one item that properly provides an example of an observational study and tell me why the other three to do not.

a) You stand next to a stop sign to determine how many bicyclist stop at the sign in a day.You observe for one hour and then calculate your results over a 24 hour period.

b) You inform customers at a local fast-food store that you are studying healthy food choices.You then sit back and record on your sheet what they order.

c) From you car you count the number of people who hold the door open for the next person as they are entering the mall.

d)To estimate the number of males and females in the community, you go to the local football game on a Friday night and count the number of males and females in attendance.

2.Why is the format used for graphical display important? Is it possible to distort data based on the manner in which it is displayed?