what is descriptive statistics? Examples?
describes what is in your data (summarizing your data)
ex. averages, percentages, probabilities, tables, graphs
what is inferential statistics?
allows us to make inferences about a populations based on the data from a sample
what is a variable give some examples
characteristic of person, place or thing ex. stress level, age, gender, religion
what is a value? give some examples
The possible categories or numbers within a variable
male or female, the different religions
what is a score? give some examples
An individual’s specific value on a variable
What are the 4 types of variables
nominal (categorical variables)
Rank-order variables (Ordinal variables)
Equal-Interval or Interval Variables
Ratio Data
What are nominal variables (4)
categorical variables
qualitative
order does not matter
lowet level of measurement
what are rank order variables also called
ordinal variables
what are ordinal variables
used to rank and order matters
differences cannot be measured
data is ordered in a meaningful way
ex. race places (1st, 2nd, 3rd)
ranking experiences - excellent, good, satisfactory, bad
what are equal interval or interval variables
order matters
no true zero starting point
there is mathematical difference between the values that can be measured and has meaning
ex. temperature
what type of variables are opinion surveys
intervals
what are ratio data variables
order matters
difference is measurable
contains a zero starting point
precise mathematical form of measurement
ex. grades
what types of variable have a meaningful order
ordinal, interval and ratio
what types of variables have a measureable difference
interval and ratio
what types of variables have a true zero starting point
ratio
what are the two types of numerical data
discrete
continuous
what is discrete data
anything that can be counted
whole numbers
cannot be subdivided further
what is continuous data
based on measurements
can include decimals
can be subdivided into smaller units
what are the two types of quantitative variables
discrete and continuous
what are discrete variables
distinct and separate numbers
what are continous quantitiative variables
measurements and fractions
what is the difference between a statistic and a parameter
statistic is based on a sample (small portion of the population)
parameter is based on the entire population
is the following a statisitic or parameter?
the average weight of all moles in the US
parameter
statistic or parameter? The average height of 100 cats in the state of California
statistic
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Unit 138
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Unit 224
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Unit 362
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Unit 421
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Unit 530
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Unit 6: Hypothesis Tests with means of samples27
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Unit 7: Effect Size and Statistical Power Notes74
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Unit 8 Introduction to the t test: Single Sample and Dependent Means42
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Unit 9: T test for Independent Means52
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Unit 10: Introduction to the Analysis Of Variance ANOVA76
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Chapter 11: Chi-Square Tests and Strategies when population distributions are not normal44
