1. Aim: what is the normal distribution?
Do Now: Two sets of data given
1. Find the mean for both
2. Find the standard deviation for both
HW: Worksheet:

2. Frequency Table xi fi xi fi1 2 3 4 5 6 7 xi fi 1 3 2 4 5 6 8 9 10

5. A bell-shaped curve called the normal curve
In a normal curve, the greatest frequency occurs at a data value in the center of the distribution.
This center value is the mean, μ
The distribution of data represented by the normal curve is called a normal distribution

6. 68%
95%
99.5%
Normal Curve

7. 68% of the scores fall within of the mean
A normal curve is divided into several sections by the standard deviations
68% of the scores fall within
of the mean
95% of the scores fall within
of the mean
99.5% of the scores fall within
of the mean

8. A normal curve divided into 100%, therefore we can find the percentile of a certain score.

9. 102. 1 locates on -1. 5 standard deviation or on about 7th percentile
102.1 locates on -1.5 standard deviation or on about 7th percentile. Then the answer is choice (1)