1. Warm-up with Scatterplot Notes
The heights of adult Somoke trees are normally distributed with a
mean height of 20.2 feet and a standard deviation of 6.5 feet. A tree
that is in the 95th percentile among all Somoke trees will have what
approximate height? 2)
3) Forty students took a statistics examination having a maximum of 50 points. The score distribution is given in the following stem-and leaf plot:

2. New Seating Chart Next Week!
I need to know if you prefer to sit in front.
I will be putting most of you in different
collaborative groups. (different people at your table)
If you have a specific request about where you sit,
just send me an by
tomorrow sometime.

3. Student of the day! Block 4

4. Student of the day! Block 5

5. Student of the day! Block 6

6. 3.1 Scatterplots
Before we were studying single variable data, now we are learning about bivariate data. Scatterplots have two variables: The predictor or explanatory variable is on the x-axis. The predicted or response variable is on the y-axis. If you created a scatter plot comparing tests scores to hours spent studying, on which axes would you put each of the variables?

7. Describing Scatterplots
Scatterplots can be described by their:
Shape: linearity (heteroscedastic or homoscedastic)
clusters (fans has variability vs. less variability)
outliers (in the x or in the y)
Trend: positive or negative
Strength: strong, weak or no correlation

8. Positive or Negative correlation
Positive or Negative correlation? Identify which variable would be on the x and y –axis.
A graph comparing the number of hours spent
studying and the grade on a test.
2) A graph showing the years after a car accident and the
corresponding car insurance rates.
3) A graph comparing shoe size and height.

9. Pinching Pages Activity
Materials: Graph paper, pencil, ruler, and textbook
You will use the front cover EVERY time you pinch pages.
To be more accurate use millimeters. Align the bottom
page with 0 on the ruler and the top of the cover is the
measurement you are writing down.
Activity is on pg 117.
*You are creating a table of your
measurements for 50, 150, 200, 250
pages. Count the pages!!! The textbook
does not start with page 1.
*When you are done measuring and putting your data in an organized
table, create a graph (label everything), and answer 4 – 7 in complete
sentences on your sheet.

10. H.W. Assignment
A.P. Statistics E#1, 3 and 5 Read 3.2 and define all terms in 3.2 Statistics – 3.1 P # 1 and 2 all parts. Answers should be in complete sentences.