1. Normal Distributions and Standard Deviation IMP4 Ms. Sia 10-22-08

2. Today’s Agenda Bell ringer (mental math) Review Graphing Distributions p. 394 Normal Areas p. 397 The Normal Table p. 398-399 Notes p. 387-391 and HW8 p. 400-401 due Thursday, October 23rd

3. Announcements ACT math session TOMORROW during 8 th and 9 th periods in the library HW Hall today and tomorrow until 4:30pm

4. This week’s vocabulary Normal distribution Standard deviation Interval z Area under the curve

5. Graphing Distributions p. 394  affects the curve by  affects the curve by

6. Normal Areas p. 397 We’ve looked at how the normal curve moves, now let’s look at the area under the normal curve. In this assignment, we’re examining the standard normal curve, where  =0 and  =1. We know the areas under the normal curve within 1 and 2 standard deviations about the mean. Can we estimate areas within other intervals?

7. Tonight’s HW HW8 p. 400-401 is due tomorrow at the beginning of class. Notes p. 387-391 are due tomorrow at the beginning of class.