Describing Data
Vocabulary
Variables and Data
Displays
The Best Distribution
100

What are the 3 measures of center?

What are mean, median, and mode?

100
This holds information about the same characteristic for many cases.
What is a variable?
100
The numbers on a football player's jersey would be this kind of variable.
What is a Categorical or Qualitative Variable?
100
A bar chart displays this kind of variable.
What is a Categorical or Qualitative Variable?
100

What 3 percentages are used in the Emprical Rule?

What are 68, 95, and 99.7%?

200

What are the 3 measures of spread (variability)?

What is standard deviation, IQR, and range

200
This is the statistical term for the number of times an event occurs.
What is frequency?
200

A list of the height, in cm, of all Wellspring students is this kind of variable.

What is a Quantitative Variable?

200
This display shows the entire group of cases as a circle.
What is a Pie Chart or Circle Graph?
200

A z-score is called a _________ value.

What is a standard(ized) value?

300

There are 3 main categories when describing the "shape" of a distribution. What are they?

What are left or right skewed, or symmetric?

300
Systematically recorded information, whether numbers or labels, together with it context.
What is data?
300
A person's telephone number is an example of this type of variable.
What is a Categorical Variable?
300

This display treats each bar as an interval on a number line and shows the frequency of data points within that range.

What is a Histogram?

300

What is the formula to calculate a z-score?

z = (x - xbar) / s

400

How do you mathematically decide what is or isn't an outlier?

What is 1.5xIQR +/- Q1 or Q3, or 2+ SD's away from the mean.
400

Individual observation that falls outside the overall pattern of the graph

What is an outlier?

400
A person's salary is an example of this type of variable.
What is a Quantitative Variable?
400

A graph used to display a bivariate quantitative data set.

What is a scatterplot?

400

When using the normalcdf function on your calculator, what values do you need to input?

What are lower bound, upper bound, mean, and standard deviation?

500

What is the name for the distribution that contains 95% of the data values within 2 standard deviations of the mean?

What is the Normal Distribution?

500
This table list the categories in a categorical variable and give the percentage of the observations for each category.
What is a Relative Frequency Table?
500
What is type of table shows the proportion of data in each cell of a bivariate data set?

What is a relative frequency table?

500

A graph that is useful when trying to compare the shape of 2 or more similar data sets, or to visualize the 5-number summary.

What is a box (and whisker) plot?

500

When using the invNorm function on the calculator, if you only input a single number, such as 0.90, what will the output represent?

The z-score (how many SD's above the mean) that will be above 90% of all other data points. 

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