1. Thursday, February 6th What are the measures of center?
What are the measures of Spread?

2. EOCT Week 4-#4 Which statement is TRUE about the function?
The function is always decreasing.
The function values are always negative.
The function has no maximum or minimum.
d. The range is {1}.

3. Outliers Comparing Data
Quiz TOMORROW
Mean
Median
Mode
MAD
Range
IQR
Outliers Comparing Data

4. Goal: Outlier effecting measures of CENTER
Homework Answers
Goal:
Outlier effecting measures of CENTER

5. Goal: Comparing measures of center and spread
Classwork Answers
Goal:
Comparing measures of center and spread

6. Remember! Measures of Center Mean Median Mode
*How CENTERED the data is
Measures of Spread
Range
MAD
IQR
*How SPREAD out the data is

7. Mean
Median
Mode
Range
MAD
IQR

8. IQR

10. Steps to find the Interquartile Range
1. Arrange the data from least to greatest.
2. Find the median.
3. Find the median of the lower quartile, 𝑸 𝟏 .
4. Find the median of the upper quartile, 𝑸 𝟑 .
4. Find the difference between the quartiles. 𝑸 𝟑 − 𝑸 𝟏

11. Median
IQR
Sample A
Sample B

12. Compare Centers:
Compare Variance/Dispersion/Spread:

13. IQR On Calculator Enter data into L1 STAT- CALC-1VARS
Scroll down to see Q1 Q3
Find difference

14. Median IQR Sample A Sample B Compare Centers:
Median
IQR
Sample A
Sample B
Compare Centers:
Compare Variance/Dispersion/Spread:

15. Median IQR Car A Car B Compare Centers:
Median
IQR
Car A
Car B
Compare Centers:
Compare Variance/Dispersion/Spread:

16. Outliers

17. 4. Any data outside the upper and lower boundaries is an outlier.
Steps
1. Find IQR.
Q3 – Q1
2. Multiply IQR by 1.5
1.5(IQR)
3. Determine the upper and lower boundaries.
Lower: Q1 – 1.5(IQR)
Upper: Q (IQR)
4. Any data outside the upper and lower boundaries is an outlier.

18. 1. Find IQR.
Q3 – Q1
2. Multiply IQR by 1.5
1.5(IQR)
3. Determine the upper and lower boundaries.
Lower: Q1 – 1.5(IQR)
Upper: Q (IQR)
Lower:
Upper:
4. Any data outside the upper and lower boundaries is an outlier.

19. Analyze Questions to Example 1: What are the outliers?
What are the outliers?
2. How has the outlier affected the center of the data?
3. How has the outlier affected the spread of the data?

20. 1. Find IQR.
2. Multiply IQR by 1.5
3. Determine the upper and lower boundaries.
4. Any data outside the upper and lower boundaries is an outlier.

21. Analyze Questions to Example 2: What are the outliers?
What are the outliers?
2. How has the outlier affected the center of the data?
3. How has the outlier affected the spread of the data?

22. Worktime
Ticket to Go
Homework