Types of Variables
Is this a quantitative or categorical variable?
The number of hours of screen time that a group of students records.
QUANTITATIVE
You calculate this statistic by adding up the values and dividing by the number of values.
What is the MEAN?
What percent of the data is to the right of the mean in a normal curve?
50%
This data display is in the shape of a circle
Pie Chart
This is what it is called when one data point is way larger or smaller than the rest of the set.
What is an outlier.
Is this a quantitative or categorical variable?
The weights of a group of babies born on a certain day
QUANTITATIVE
This is calculated by subtracting the smallest number from the largest number.
What is the RANGE?
68%
This data display is for quantitative data and its a rectangle with two lines coming off each side.
Box and Whisker Plot
Normal curves are perfectly balanced on both sides. How can we describe a normal curve that isn't balanced on both sides.
Skew
Is this a quantitative or a categorical variable?
People choosing their preference between five different pizza restaurants.
CATEGORICAL
You find this statistic by putting the numbers in order from least to greatest and finding the middle number.
What is the MEDIAN?
What percent of the data is between +3 and -3 standard deviations of the mean?
99.7%
This data display looks like a bar graph but is used for quantitative data.
Histogram
This is a way of measuring how far from the mean a data point is.
What is standard deviation
Is this a quantitative or a categorical variable?
What grade a group of teenagers are in.
CATEGORICAL
After you find the median, if you find the median of the smaller side of the data, and then the median of the higher side of the data, AND THEN you subtract those numbers, you get this number.
What is the INTER-QUARTILE RANGE?
What is the calculation called when you subtract the mean from a value and divide by the standard deviation?
Z-Score
This is a display for quantitative data where the numbers are broken up by a line separating the tens digit and a group of ones digits
Stem and Leaf Display
To find this, put the data in order from least to greatest, count up how many data points are to the left of your data, then divide that by the total number of data points in the set.
What is percentile rank
Think of something that can be measured either as a categorical or a quantitative variable and explain it.
Let's see what you've got!
Find the median of these numbers:
7, 11, 3, 5, 7, 8, 15
7
What percentage of data would be between +1 and +2 standard deviations of the mean?
13.5
This is a way to display results from two different categorical questions on the same display.
Two way table OR contingency table
This is a way of reasoning, along with a collection of tools and methods, designed to help us understand the world.
What is statistics.