1. Bellwork: Monday

2. Measures of Central Tendencies/ Box and Whisker Plots

3. Measures of Central Tendencies
Video:

4. -------------Inter Quartile Range------- (IQR)
Box and Whisker plot
This data represents the ages of people at a party. There are 20 people at the party
All quartiles (sections) have the same number of data points (4 people fall in each section)
Median
Minimum Lower Extreme
Maximum
Upper Extreme
25%
25%
25%
Inter Quartile Range (IQR)
25%
Lower Quartile (Q1)
Upper Quartile (Q3)

5. Definitions Range Example: 29 – 7 =22
greatest value – least value
Example: 29 – 7 =22
Interquartile Range- (variability)
the upper quartile – lower quartile (the range of the box)
Example: 26 – 14.5 =11.5
Measures of Center- Mean and Median
Only can find MEDIAN on a box and whisker plot
Median
the middle number when data is ordered least to greatest
Example: Median= Mean= CANNOT FIND!!!

6. Dot Plot Range Example: 5 - 0= 5 Mean Median Mode
greatest value – least value
Example: 5 - 0= 5
Mean
The average (add up all the values and divide by the number of values in the data set
Example: = 3 9
Median
the middle number when data is ordered least to greatest
Example: Median= 3
Mode
the most often occurring

7. Questions

8. Bellwork: Tuesday

9. Comparing Data: Notes

10. Comparing
What information can you get from a dot plot that you cannot get from a box and whisker plot?
What information can you get from looking at a box and whisker plot that is not given in a dot plot?
What information is given on both a dot plot and a box and whisker plot?

11. Instruction Book Page 274-275

12. Example:

13. Instruction Book Page 270

14. Instruction Book Page 278

15. Bellwork: Wednesday

16. Examples

20. 10

21. (HINT: Mean and Median)

24. Bellwork: Thursday

25. Random Samples
7. SP.1 Understand that statistics can be used to gain information about a population by examining a sample of the population; generalizations about a population from a sample are valid only if the sample is representative of that population. Understand that random sampling tends to produce representative samples and support valid inferences.

26. Instruction Book Page 248
Have out a highlighter

27. Instruction Book Page 249 Random Sample Write in:
**A random sample represents the whole population**

28. Biased Sample Write in:
**Biased sample does not represent the whole population**

29. Instruction Book Page 250

30. Instruction Book Page 251

35. Bellwork: Friday
Have out a piece of paper and a pencil for a Bellwork quiz.

36. Bellwork Quiz