Types of variables
Statistics and Samples
Sampling and the Sampling Distribution
Misc.
Probability and Equations
100
This variable has a numerical value for which operations such as addition or averaging make sense
What is quantitative variable
100
This is a characteristic or measure obtained by using the data values from a sample
Statistic
100
Selecting subjects and individuals in a way that the sample is not representative of the population
Sampling bias
100
What measure of central tendency must appear in the data set and is the most frequently occurring value?
Mode
100
When asked for the probability of one event AND another (independent) event, what "rule" do you use for the calculation?
Multiplication rule
200
This kind of variable describes and individual by placing the individual into a category or group
Qualitative variable
200
This is a subset of population used to make inferences about a greater population
Sample
200
Dividing a population into groups called strata and draw a random sample from those strata
Stratified sampling
200
Which measure of central tendency uses all data values in it's calculation, which makes it vulnerable to outliers
Mean
200
The ___________ of an event is all outcomes that are not the event
Complement
300
This type of variable applies to data that consist of names, labels or categories (think level of measurement)
Nominal variable
300
This is the entire group of individuals that we are interested in study
The population
300
Assigning all individuals a number and picking the "kth" indivudal
Systematic sampling
300
Variable we believe is inflicting a change
Independent variable
300
What is the z-score formula?
z= (x - mu)/standard deviation
400
Applies to data that can be arranged in order, but the value differences between them cannot be determined or are meaningless
Ordinal variable
400
This characteristic or measure obtained by using data values from a population
Parameter
400
This distribution tells us how close the value of the statistic is to the unknown value of the parameter
Sampling distribution
400
What kind of distributions have one tail that is longer than the other?
Skewed distributions
400
When calculating the probability of one event OR another event, what rule do you use?
Additive Rule
500
Variables that can be arranged in order AND the differences between data values are meaningful AND there is a true zero
Ratio variables
500
What is the most popular/important sampling technique that holds that every sample size (and individual) has an equal chance of being selected
Simple random sampling
500
What does the CLT tell us?
For a population with any distribution, distribution of sample mean approaches a normal distribution as the sample size increases
500
The variable that we believe will be changed at the introduction of an intervention/treatment
Dependent variable
500
What is the null hypothesis?
the hypothesis that states the assumption to be tested!
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