Measures of Center
mean < median
What is skewed left?
Q3 - Q1
What is the Interquartile Range (IQR)?
this display is used to for the five-number summary.
What is a box plot?
in this method people choose to participate
What is voluntary response?
additional factors that make it difficult to determine if one variable causes changes in another variable
What is a confounding variable?
resistant to skew and outliers
What is the median?
the typical distance from the mean
What is standard deviation?
this display is used for percents
What is a circle graph or pie chart?
in this method people are easy to reach
What is convenience sample?
no treatment is imposed
What is an observational study?
nonresistant to skew and outliers
What is the mean?
uses the standard deviation for variability
What is a symmetric distribution?
this display is used for categorical data
What is a bar graph?
convenience sample and voluntary response lead to this
What is bias?
allows the researcher to show the treatment caused the changes
What is random assignment?
About 50% of the (context) is at or below the ____.
What is the median?
uses the IQR for variability
What is a skewed distribution? (skewed left or skewed right)
this display is used for quantitative data
What is a histogram?
allows every individual to be equally represented and allows a generalization of a conclusion to a larger population
What is random sample?
setting up a good experiment
What is compare, randomize, control, and replicate?
average
What is the mean?
nonresistant to skew and outliers
What is the standard deviation?
this display represent the data as a dot on a number line
What is a dotplot?
What the random sample is selected from
What is the population?
treatments are imposed and allows us to show causation
What is an experiment?