Lecture 7 Flashcards
What are the 4 types of data analysis?
Prepare the data for analysis
Summarize the data
Put your hypothesis to the test
Interpret results
Preparing data for analysis includes?
Data cleaning and correcting errors
Examine distribution
Summarizing the data includes?
Central tendency and dispersion
Graphs and tables
Putting your hypothesis to the test includes what?
Does you IV have an effect on your DV
Creating composite variables for analysis is in what step? Include examples too.
Entering the data. Ex) IQ subscales = verbal + performance IQ
What are some common graphs used to visualize data?
Stem and leaf
Histograms
The larger the sample, the better the chance for a __________ _________.
normal distribution
If your data isn’t in a normal distribution what can you do to remedy it?
You can use a transformation (Logarithmic) or alternative (non-parametric)
What is used to describe the distribution of the data?
Central tendency
Dispersion
Sample stats are estimates of __________ _________ values.
true population
Nominal and ordinal scale data are __________.
categorical
Interval and ratio data are ___________.
continuous
Central tendency is the _______ value of your data.
central (mean, median, mode)
What is dispersion?
how variable your data is
What is standard deviation mean?
How far your average score is from the mean.
A range of values that we are x percent confident includes the population mean…?
Confidence interval
What is a more accurate indicator of central tendency when data are skewed?
Median
Why is variability so important?
Variability provides important information that you can use to your advantage.
A 95% confidence interval means what?
95% confidence level that the reported interval range contains the true population mean.
What was the purpose of the two experiments in the article?
Purpose was to examine pressure felt by the U.S. immigrant groups to prove that they belong by consuming more American (and unhealthy) food.
What were the basic results of each experiment in “Fitting in but getting fat”?
1) Asians were 3x as likely to say and American food as their favorite if they were asked if they spoke English beforehand compared to those who weren’t asked.
2) Asians were also more likely to order and eat more fatty American foods when their nationality was directly challenged.
Define Effect size
Provides info on the strength of the relationship btw IV and DV independent of sample size. Size of the effect of IV is in terms of avg. amount of dispersal scores occurring in an experiment.
