Chapters 13, 14 & 15: t tests, One Sample, Two Independent Samples, Two Related Samples, and Significance Test for Pearson's r t Test for One Sample t = (X-bar hyp)/sX-bar
X-bar = sample mean hyp = p
Differences between Z and T Test
1. Z-test is a statistical hypothesis test that follows a
normal distribution while T-test follows a Students Tdistribution.
2. A T-test is appropriate when you are ha
Coefficients of determination (r^2) The proportion of variability in one variable
that is explained by the other. Only explains linear relationships.
1.1- small
0.02-0.24= medium
0.25= large correlati
Descriptive Statistics: Procedures that summarize and simplify data
Inferential Statistics: Procedures that allow us to make generalizations about
populations from which they were selected
Population:
1/27/16
Thursday, January 28, 2016
10:42 PM
1/27/16
Statistics in Psychological Research
2302 30534
Quiz Review
Multiple choice, true false, and short answer
Example: difference between negative/posi
1/25/16
Thursday, January 28, 2016
10:25 PM
01/25/16
Statistics in Psychological Research
2302 30534
Variability
To best characterize data, it is important to look at the dispersion or spread in a d
Lecture One
Sunday, January 24, 2016
3:52 PM
01/11/16
Statistics in Psychological Research
2302 30534
Distinction between data and statistics
Data: actual number or measurements collected through ob
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360 Huntington Ave, 20 Dodge Hall, Boston, MA 02115
NO NOTES FORM
DATE:
1/28/2016
Course # :
2302
CRN :
30534
Reason for No Notes (please check all that applies):
Professo
1/20/16
Sunday, January 24, 2016
4:17 PM
01/20/16
Statistics in Psychological Research
2302 30534
Graphing Frequency Distributions
Bar Graphs: most widely used for qualitative data
In X and Y chart
Chapters 8, 9 and 10: Populations, Samples and Probability, Sampling Distribution of the Mean, The z Test Populations, Samples and Probability Populations and Samples Real populations Random samples H
Exam 3-Statistics
Single Sample T-Test- if I calculate the mean and compare it to hypothesized mean
for population
-However, you never really know what the mean of the population is
Independent Measur
Niesha Santiago
Psych 309
Prof Schlussman
Paper # 2
Evaluation of the David Reimer Case
Society is deeply infatuated with the idea of its a girl or its a boy rather than
focusing on the emotional, phy
Steps to Follow (finding percentages, proportions)
1. Sketch the problem. 2. Plan the solution. 3. Compute the necessary z scores. 4. Find the necessary areas under the curve from the table and compl
Chapter 2: Describing Data with Tables and Graphs
Describing data with tables
Frequency distributions for quantitative data Ungrouped data Capital Punishment Grouped data Shyness Relative Frequency Di
Analysis Decision Tree
Evaluate Experiment: Does it involve one sample or two?
One Sample
Two Samples: Test of relationship or test of differences?
Pop. S.D. Known
Pop. S.D. Unknown
Relationship
D
Chapters 23 and 27: One-Way ANOVA and Chi-Square
ANOVA
One-way ANOVA vs. multiple t tests and ballooning alpha Conceptual relationship between ANOVA and t test Sums of Squares (definitional formulas)
Introduction
Descriptive vs. Inferential Statistics
Population vs. Sample Random Sampling vs. Random Assignment Data: Qualitative vs. Ranked vs. Quantitative Levels of Measurement: Nominal vs. Ordinal
Chapter 3: Describing Data with Averages: Central Tendency Mode Median Mean How to compute these measures Properties of these measures Advantages and Disadvantages
Type of Data: Are observations numbers? Yes: Quantitative No: Qualitative (p. 2)
One Sample
Two Samples
Three Samples: ANOVA
Pop. S.D. Unknown
Relationship t test for correlation
Differences
t
Chapter 5: Standard (z) Scores and Normal Distributions Background Two Generalizations Z-scores and Standard Normal Distributions You should be able to: 1) Find proportions or percentages given scores
Niesha Santiago
Psych 309
Prof Schlussman
Paper # 3
The question remains unanswered if stress is the reason the hippocampus shrink
or does a small hippocampus make people more susceptible to stress? T
1/21/16
Sunday, January 24, 2016
4:30 PM
01/21/16
Statistics in Psychological Research
2302 30534
Central Tendency
1.
2.
3.
Notion of averages
3 ways to measure central tendency
Mean
Median
Mode
Mode