Statistics, Variables, Samples & Populations Flashcards
What is a variable?
Something that can vary
What are the 3 types of variables?
1) Discrete
2) Continuous
3) Categorial
Which variable(s) are non-numerical?
Categorical
Which variable(s) are numerical?
Discrete and Continuous
The breed of dog tested is what type of variable?
Non-numerical -> Categorical
Weight is what type of variable?
Numerical -> Continuous
No. of siblings is what type of variable?
Numerical -> Discrete
Shoe size is what type of variable?
Numerical -> Discrete
Anxiety level is what type of variable?
Numerical -> Continuous
Define a population parameter
A quantity that describes some characteristic of a population with respect to a specific variable
e.g. population mean, population range
A quantity that describes some characteristic of a population with respect to a specific variable is called a…?
Population parameter
Define a sample statistic
A quantity that describes some characteristic of a sample with respect to a specific variable
A quantity that describes some characteristic of a sample with respect to a specific variable is a …?
Sample statistic
When is a sample statistic more likely to provide a better estimate of a population parameter?
When the sample size is large
- Because the larger the sample size, the more accurate the average values will be
- Since you are studying more people in your sample, you will have a better estimation of the population’s average
- Larger samples can also help with spotting outliers
We calculated a summary _________ for the _________ ‘IQ score’ based on a _________ of 100 people selected at random from the _________ of adults with blue eyes.
a. statistic, variable, sample, population b. sample, population, statistic, variable c. variable, sample, population, statistic d. population, sample, statistic, variable
A
