Exss 273: intro to research
Discuss data sources
-Surveys, questionnaires, interviews, just want info
-Problems: lie, may not know, different methods to measure same thing = different results.
Basic research- chemistry and biology- cell research not usual
Data Analysis Project #1 = 10 possible points
(Due: Tuesday November 3rd, 2015)
(Note: It is expected that you work on the homework independently. This is not a group
1. Enter the following data into SPSS: Save the data as selfesteem_
Exss 273: intro to sampling
Generalizability not always true
-Also the results of your study are not proof.
Inferential statistics- inferring that the characteristics you get from your sample, can be inferred
upon the population.
Characteristic of a sampl
Exss 273 Notes: Theory Dissemination
Theory A group of logically related statements that explain things that have occurred
in the past and predict things that will occur in the future.
Give knowledge about
Concepts and categories in the area
Exss 273: Intro to Statistics:
Measures of central tendency: mode, median, mean
Variability: range, variance, standard deviation
The Scientific Method allows us to:
Make a decision based on sound measurements with some degree of certainty
Exss 273: Notes Hypothesis and Testing and Inferential Statistics
Inferential statistics- taking info we get from sample and making inference about a population.
-Measure of central tendency that is most appropriate = mean.
Normal distribution and standar
Exss 273 Notes: Experimental Research Design
Validity- measuring what its supposed to be measuring
Internal validity- will it be able to answer the research question?
External validity- generalizability of results
Independent variable (IV)- researcher man
Exss 273 Notes: Ethical Concerns
Conducting and disseminating research are essential components of the professoriate
60% teaching, 30% research, 10% service
Proportions differ across institutions
Tenure and promotion
Publish or peris
Exss 273: Notes Normal Distribution
Normal Distribution- Visual representation of a distribution of scores where the mean,
median, and mode are all equal to each other.
A large percentage of the variables encountered in research in EXSS are normally
Exss 273: Correlation and Regression
Correlation technique for determining the extent of the relationship between variables
How the value of one variable changes when the value of another variable is
Assumes that each subject has a value/score f
Exss 273 Notes: Intro to Measurement
Measurement refers to the process of assigning numbers to data/characteristics
-Data are the result of measurement
-Characteristics: hair color, gender, test score, height
Scales of measurement
-Variables grouped into
Place the answer to each question on the line beside each number.
Bees pollinate how much of our food crop?
How many beehives does the largest beekeeper have?
What is the last step in a bees