1. As a general rule,statistical analysis states that the standard deviation can be estimated using the formula ran 6 ge . (a) Do you think this estimate of is reasonable? Explain. (b) Using the data in Question 3,what estimations of do you get?

2. An upcoming renovation to your school will leave exposed beams in the hallways. It is estimated that the tallest 15% of students might hit their head on these new beams. If your school has a mean height of 173 cm with a standard deviation of 7.7 cm,estimate what range of students would be affected? (Hint:Consider the tall half of a normal distribution.