Screen Stage Lecturers desk Row C Row D

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Screen Stage Lecturer’s desk Row C Row D Row E Row F Row G

Screen Stage Lecturer’s desk Row C Row D Row E Row F Row G Row H Row J Row K Row L Row M 28 27 26 28 27 25 24 23 22 26 25 24 23 22 28 27 26 25 24 23 22 28 27 26 25 24 23 22 28 27 26 25 24 23 22 table 3 broke n desk 2 1 Row A Row B Row C Row D Row E Row F Row G Row H Row J Row K Row L Row M 14 13 12 11 10 9 8 7 6 5 4 3 2 1 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 21 20 19 18 17 16 13 12 11 10 9 8 7 6 5 4 3 2 1 14 13 2 1 Projection Booth Modern Languages R/L handed table 3 2 1 Row C Row D Row E Row F Row G Row H Row J Row K Row L Row M

MGMT 276: Statistical Inference in Management Spring 2015

MGMT 276: Statistical Inference in Management Spring 2015

Schedule of readings Before next exam: February 17 th Please read chapters 1 -

Schedule of readings Before next exam: February 17 th Please read chapters 1 - 4 & Appendix D & E in Lind Please read Chapters 1, 5, 6 and 13 in Plous • Chapter 1: Selective Perception • Chapter 5: Plasticity • Chapter 6: Effects of Question Wording and Framing • Chapter 13: Anchoring and Adjustment

By the end of lecture today 2/12/15 Measures of variability Standard deviation Variance Review

By the end of lecture today 2/12/15 Measures of variability Standard deviation Variance Review for Exam 1

No Homework due Tuesday, Feb th 17 Just study for Exam 1

No Homework due Tuesday, Feb th 17 Just study for Exam 1

Exam 1 – This Tuesday February 17 th Study guide is online Bring 2

Exam 1 – This Tuesday February 17 th Study guide is online Bring 2 calculators (remember only simple calculators, we can’t use calculators with programming functions) Bring 2 pencils (with good erasers) Bring ID Stats Review by Jonathon When: Monday evening February 16 th - 6: 00 – 7: 50 pm Where: Bio East 100 Cost: $5. 00

Review of Homework Worksheet

Review of Homework Worksheet

Review of Homework Worksheet 3 – 5 = -2 6 – 5 = +1

Review of Homework Worksheet 3 – 5 = -2 6 – 5 = +1 50 2 5 . 625 -22= 4 -2 1 3 -1 0 3 -3 -1 1 -1 4 1 9 1 0 9 9 1 1 1 0 36 = 2 10 - 1 4. 5 2 8 12= 1 36 4 6

Review of Homework Worksheet -12= 1 5 – 6 = -1 -1 2 -1

Review of Homework Worksheet -12= 1 5 – 6 = -1 -1 2 -1 -1 3 60 2. 4 6 1 4 1 1 9 8 – 6 = +2 0 -1 3 1 -5 0 52 10 - 1 1 2 2= 4 0 1 9 1 25 52 = 2. 4 5. 5 9 5 8

Review of Homework Worksheet Must be complete and must be stapled

Review of Homework Worksheet Must be complete and must be stapled

Standard deviation: The average amount by “Sum which observations deviateofon either side of their

Standard deviation: The average amount by “Sum which observations deviateofon either side of their mean Square s” Remember, it’s relative to the mean “n-1” is “Degrees of Freedom” Based on difference from the mean Please memorize these Deviation scores Diallo is 0” Preston is 2” Mike is -4” Hunter is -2 Shea is 4 David 0” Generally, (on average) how far away is each score from the mean? Mean Diallo Remember, We are Presto n She thinking Mik in aterms of e “deviations”

Summary of 7 facts to memorize

Summary of 7 facts to memorize

Movie Packages We sampled 100 movie theaters (Two tickets, large popcorn and 2 drinks)

Movie Packages We sampled 100 movie theaters (Two tickets, large popcorn and 2 drinks) 12 Frequency 10 8 6 4 2 0 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 Price per Movie Package Mean = $37 Range = $27 - $47 Standard Deviation = 3. 5

Amount of Bonuses (based on commission) We sampled 100 retail workers 68% 95% 99.

Amount of Bonuses (based on commission) We sampled 100 retail workers 68% 95% 99. 7% Mean = $50 Range = $25 - $75 Standard Deviation = 10

Pounds of pressure to break casing on an insulator (We applied pressure until the

Pounds of pressure to break casing on an insulator (We applied pressure until the insulator casing broke) Mean = 1700 pounds Range = 1200 – 2100 Standard Deviation = 200 2100– 1700 = 400 What’s the 1200 – 1700 = largest 500 possible deviation? What’s the ‘typical’ or standard deviation?

Amount of Bonuses (based on commission) We sampled 100 retail workers $75 – $50=

Amount of Bonuses (based on commission) We sampled 100 retail workers $75 – $50= $25 Mean = $50 Range = $25 - $75 Standard Deviation = 10 What’s the $25 – $50= -$25 largest possible deviation? What’s the ‘typical’ or standard deviation?

Waiting time for service at bank We sampled 100 banks (From time entering line

Waiting time for service at bank We sampled 100 banks (From time entering line to time reaching teller) Mean = 3 minutes Range = 2. 2 - 3. 8 Standard Deviation = 0. 30 3. 8 – 3. 0=. 8 2. 2 – 3. 0= -. 8 What’s the largest possible deviation? What’s the ‘typical’ or standard deviation?

Scores, standard deviations, and probabilities Actually 95. 44 To be exactly 95% we will

Scores, standard deviations, and probabilities Actually 95. 44 To be exactly 95% we will use z = 1. 96 Actually 68. 26

Random sampling vs Random assignment of participants into groups: Any subject had an equal

Random sampling vs Random assignment of participants into groups: Any subject had an equal chance of getting assigned to either condition (related to quasi versus true experiment) Random sampling of participants into experiment: Each person in the population has an equal chance of being selected to be in the sample Rev iew

From the lab review IV: Nominal Ordinal Type of Independent Interval or Mariska works

From the lab review IV: Nominal Ordinal Type of Independent Interval or Mariska works at a cattle ranch, and wants Cow Chow Variable? Ratio? IV: cattle to gain as much weight as possible. Discrete Continuous No, only Random Mariska wants to know if the new feed makes a or discrete? Random convenience Sampling? DV: Nominal difference in how much weight the cattle gain. Assignment? sampling Assignment Ratio Ordinal Weight Dependen (True Expt) Interval or t She gathers the first 100 cows that she finds DV: Ratio? Variable? in the meadow, and then randomly assigns those 100 cows into two groups (50 each group) One group gets the new feed for 6 months, while the other group of cattle gets the old feed. She is not looking for any trends over time, but is just looking for a difference between the two types of cow chow (feed). Continuous or discrete? Betweenor Between Participant within? Design Cross Sectionalor Sectional Time Series

Question 9 - Does amount of sleep (4 vs 8 hours) affect class attendance?

Question 9 - Does amount of sleep (4 vs 8 hours) affect class attendance? Selected 350 students from 38, 000 undergraduates at U of Washington and randomly assigned students into two groups. What is the independent variable? - Amount of sleep How many levels are there of the IV? - 2 levels (4 hours vs 8 hours) What is the dependent variable? Group 1 gets 4 hours sleep - Class attendance What is population and sample? - Population: whole school Note: Parameter would - Sample: group of 350 students be what we are guessing for the whole school What is statistic ? based on these 350 students Group 2 gets 8 hours sleep - Average class attendance for 350 students Quasi versus true experiment (random assignment)? - True Random sample? - Doesn’t say in the problem, so we have to assume “no”

Question 10 - Does gender of the teacher affect test scores for the students

Question 10 - Does gender of the teacher affect test scores for the students in California? Selected 150 students from Santa Monica and created two groups. What is the independent variable? - Gender of teacher How many levels are there of the IV? - 2 levels (male vs female teacher) Group 1 gets a female teacher Group 2 gets a male teacher What is the dependent variable? - Test Scores What is population and sample? - Population: California - Sample: group of 150 students from Santa Monica What is statistic ? - Average test score for 150 students Quasi versus true experiment (random assignment)? - Doesn’t say in the problem, so we have to assume “no” Random sample? - No – Random sample would require that everyone in California be equally likely to be chosen.

Writing Assignment – Pop Quiz 1. What does symbol refer to? • What is

Writing Assignment – Pop Quiz 1. What does symbol refer to? • What is itthis called? • What does it mean? • Is it referring to a sample or population? 2. What does symbol refer to? • What is itthis called? • What does it mean? • Is it referring to a sample or population? 3. What does symbol refer to? • What is itthis called? • What does it mean? • Is it referring to a sample or population? 4. What does this symbol refer to? • What is it called? • What does it mean? • Is it referring to a sample or population? 5. What does this symbol refer to?

Writing Assignment – Pop Quiz 6. What does this refer to? • What are

Writing Assignment – Pop Quiz 6. What does this refer to? • What are they called? • What do they refer to? • How are they different 7. What does this refer to? • What are they called? • How are they different 8. What do these two refer to? • What are they called? • How are they different 9. What does this refer to? • What is it called? • Use it for sample data or population?

Writing Assignment – Pop Quiz 10. What does this refer to? • What are

Writing Assignment – Pop Quiz 10. What does this refer to? • What are they called? • What do they refer to? • How are they different 11. What does this refer to? • What are they called? • What do they refer to? • How are they different

Writing Assignment – Pop Quiz 1. What does symbol refer to? • What is

Writing Assignment – Pop Quiz 1. What does symbol refer to? • What is itthis called? sigm a • What does it mean? tion a l u • Is it referring to a sample or population? 2. What does symbol refer to? • What is itthis called? mu • What does it mean? tion a l u p • Is it referring to a sample orpo population? 3. What does symbol refer to? • What is itthis called? x-ba • What does it mean? r le amp s • Is it referring to a sample or population? 4. What does this symbol refer to? • What is it called? s • What does it mean? ple sam • Is it referring to a sample or population? 5. What does this symbol refer to? The st dev andar (po iatio d pul n atio n) Th (po e mea pul n atio n) The (sam mean ple ) The st dev andar d i (sam ation ple ) Each ind ividual score

Writing Assignment – Pop Quiz p Variance S squ ared squa roen d e

Writing Assignment – Pop Quiz p Variance S squ ared squa roen d e i pl at l m u sa op Sigm a Deviation scores n pl e p m 8. What do these two refer to? • What are they called? • How are they different e pl m sa sa 6. What does this refer to? • What are they called? • What do they refer to? • How are they different 7. What does this refer to? • What are they called? • How are they different n io t a ul p o at ul io p po Sum of squares 9. What does this refer to? • What is it called? • Use it for sample data or population? Degrees of freedom

rd a d n Sta ation i v e D Writing Assignment – Pop

rd a d n Sta ation i v e D Writing Assignment – Pop Quiz pu m pl tio la e e n c n a ri Va m e n io at pl l pu sa po 11. What does this refer to? • What are they called? • What do they refer to? • How are they different sa po 10. What does this refer to? • What are they called? • What do they refer to? • How are they different

Exam 1 Review

Exam 1 Review