1. Introduction to Statistics for the Social Sciences SBS200 - Lecture Section 001, Fall 2017 Room 150 Harvill Building 10: :50 Mondays, Wednesdays & Fridays.
Welcome

2. Lecturer’s desk Projection Booth Screen Screen Harvill 150 renumbered
Row A 15 14
Row A 13 3 2 1
Row A
Row B 23 20
Row B 19 5 4
3 2 1
Row B
Row C 25 21
Row C 20 6 5 1
Row C
Row D 29 23
Row D 22 8 7 1
Row D
Row E 31 23
Row E 23 9 8 1
Row E
Row F 35 26
Row F 25 11 10 1
Row F
Row G 35 26
Row G 25 11 10 1
Row G
Row H 37 28 27 13
Row H 12 1
Row H 41 29 28 14
Row J 13 1
Row J 41 29
Row K 28 14 13 1
Row K
Row L 33 25
Row L 24 10 9 1
Row L
Row M 21 20 19
Row M 18 4 3 2 1
Row M
Row N 15 1
Row P 15 1
Harvill 150
renumbered
table 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
Projection Booth
Left handed desk

3. Study guide is online Homework Assignment No new Homework is due:
Please review previous homeworks
in preparation for Exam 3
Study guide is online

4. A note on doodling

5. Lab sessions Labs Prep for Exam 3 Everyone will want to be enrolled
in one of the lab sessions
Labs Prep for Exam 3

6. Schedule of readings Before next exam (November 17th)
Please read chapters in OpenStax textbook
Please read Chapters 2, 3, and 4 in Plous
Chapter 2: Cognitive Dissonance
Chapter 3: Memory and Hindsight Bias
Chapter 4: Context Dependence
Study guide is online

7. In a one-way ANOVA we have three types of variability.
Let’s try one
In a one-way ANOVA we have three types of variability.
Which picture best depicts the random error variability (also known as the within variability)?
a. Figure 1
b. Figure 2
c. Figure 3
d. All of the above 1.
correct 2. 3.

8. In a one-way ANOVA we have three types of variability.
Let’s try one
In a one-way ANOVA we have three types of variability.
Which picture best depicts the between group variability?
a. Figure 1
b. Figure 2
c. Figure 3
d. All of the above
correct 1. 2. 3.

9. Which figure would depict the largest F ratio a. Figure 1 b. Figure 2
Variability between groups
F =
Let’s try one
Variability within groups
“F ratio” is referring
to "observed F”
Which figure would depict the largest F ratio
a. Figure 1
b. Figure 2
c. Figure 3
d. All of the above
correct 1. 2. 3.

10. Winnie found an observed F ratio of .9, what should she conclude?
Let’s try one
Winnie found an observed F ratio of .9, what should she conclude?
a. Reject the null hypothesis
b. Do not reject the null hypothesis
c. Not enough info is given
correct 1. 2. 3.

11. Winnie found an observed z of .74, what should she conclude?
If your observed z is within
one standard deviation of the mean,
you will never reject the null
Let’s try one
Winnie found an observed z of .74, what should she conclude?
(Hint: notice that .74 is less than 1)
a. Reject the null hypothesis
b. Do not reject the null hypothesis
c. Not enough info is given
correct x x
small observed z score
small observed z score

12. Winnie found an observed t of .04, what should she conclude?
Let’s try one
Winnie found an observed t of .04, what should she conclude?
(Hint: notice that .04 is less than 1)
a. Reject the null hypothesis
b. Do not reject the null hypothesis
c. Not enough info is given
correct x
small observed t score

13. F(4, 25) = 3.12; p < 0.05 Let’s try one
How many
observations within
each group?
Let’s try one
An ANOVA was conducted comparing different types of solar cells and there appears to be a significant difference in output of each (watts) F(4, 25) = 3.12; p < In this study there were __ types of solar cells and __ total observations in the whole study?
a. 4; 25
b. 5; 30
c. 4; 30
d. 5; 25
F(4, 25) = 3.12; p < 0.05
correct
# groups - 1
# scores - # of groups
# scores - 1

14. F(4, 25) = 3.12; p < 0.05 Let’s try one
An ANOVA was conducted comparing different types of solar cells and there appears to be significant difference in output of each (watts) F(4, 25) = 3.12; p < In this study ___
a. we rejected the null hypothesis
b. we did not reject the null hypothesis
correct
F(4, 25) = 3.12; p < 0.05
Observed F
bigger than
Critical F
p < .05

15. F(4, 25) = 3.12; p < 0.05 Let’s try one
An ANOVA was conducted comparing different types of solar cells. The analysis was completed using an alpha of But Julia now wants to know if she can reject the null with an alpha of at In this study ___
a. we rejected the null hypothesis
b. we did not reject the null hypothesis
correct
F(4, 25) = 3.12; p < 0.05
Comparison of the Observed F and Critical F
Is no longer are helpful because
the critical F is no longer correct.
We must use the p value
p < .05
p > .01

16. Let’s try one
An ANOVA was conducted comparing home prices in four neighborhoods (Southpark, Northpark, Westpark, Eastpark) .
For each neighborhood we measured the price of four homes. Please complete this ANOVA table. Degrees of freedom between is _____; degrees of freedom within is ____
a. 16; 4
b. 4; 16
c. 12; 3
d. 3; 12
correct .

17. Let’s try one
An ANOVA was conducted comparing home prices in four neighborhoods (Southpark, Northpark, Westpark, Eastpark) .
For each neighborhood we measured the price of four homes. Please complete this ANOVA table. Mean Square between is _____; Mean Square within is ____
a. 300, 300
b. 100, 100
c. 100, 25
d. 25, 100
correct .

18. Let’s try one
An ANOVA was conducted comparing home prices in four neighborhoods (Southpark, Northpark, Westpark, Eastpark) .
For each neighborhood we measured the price of four homes. Please complete this ANOVA table. The F ratio is:
a. .25
b. 1
c. 4
d. 25
correct .

19. a. reject the null hypothesis b. not reject the null hypothesis
Let’s try one
An ANOVA was conducted comparing home prices in four neighborhoods (Southpark, Northpark, Westpark, Eastpark) .
For each neighborhood we measured the price of four homes. Please complete this ANOVA table, alpha = We should:
a. reject the null hypothesis
b. not reject the null hypothesis
correct
Observed F
bigger than
Critical F
p < .05

20. Let’s try one
An ANOVA was conducted comparing home prices in four neighborhoods (Southpark, Northpark, Westpark, Eastpark) .
For each neighborhood we measured the price of four homes. The most expensive neighborhood was the ____ neighborhood
a. Southpark
b. Northpark
c. Westpark
d. Eastpark
correct

21. An ANOVA was conducted comparing home prices in four neighborhoods (Southpark, Northpark, Westpark, Eastpark) .
For each neighborhood we measured the price of four homes. Please complete this ANOVA table. The best summary statement is:
a. F(3, 12) = 4.0; n.s.
b. F(3, 12) = 4.0; p < 0.05
c. F(3, 12) = 3.49; n.s.
d. F(3, 12) = 3.49; p < 0.05
correct

22. Please fill in the blank a. 3.3541 b. .00635 c. 6.1363 d. 27.00
Let’s try one
An ANOVA was conducted and there appears to be a significant difference in the number of cookies sold as a result of the different levels of incentive F(2, 27) = ___; p < 0.05.
Please fill in the blank a b c d
correct

23. F(4, 45) = 9.49; p < 0.01 Let’s try one
An ANOVA was conducted comparing “best racquet” scores for different types of tennis racquets. The results were:
F(4, 45) = 9.49; p < What should we conclude?
a. we rejected the null hypothesis
b. we did not reject the null hypothesis
correct
F(4, 45) = 9.49; p < 0.01

24. F(4, 45) = 9.49; p < 0.01 Let’s try one
An ANOVA was conducted comparing “best racquet” scores for different types of tennis racquets. The results were:
F(4, 45) = 9.49; p < But Julia now wants to know if she can reject the null with an alpha of at In this study ___
a. we rejected the null hypothesis
b. we did not reject the null hypothesis
correct
F(4, 45) = 9.49; p < 0.01

25. Thank you!
See you next time!!