Measures of Center
To find this, you add all the values in a data set and divide by the total number of values.
What is the mean?
This is the difference between the maximum and minimum values in a data set.
What is the range?
Why is "How old am I?" NOT a statistical question?
What is it only has one specific answer (no variability)?
If 25% of students spend more than 4 hours on homework, which part of a box plot represents those students?
What is the upper whisker (between Q3 and the maximum)?
A display that shows data on a number line using "X"s or dots to show frequency.
What is a dot plot (or line plot)?
Find the median of this set of test scores: 72, 85, 90, 64, 88.
What is 85?
In a box plot, this specific quartile represents the median of the lower half of the data.
What is the First Quartile (or Q1)?
This type of graph uses "bars" or intervals to show the frequency of data.
What is a histogram?
Looking at a dot plot, the value that occurs most often is called the what?
What is the mode?
If a data set is 10, 20, 30, this is the range.
What is 20?
If a data set has an even number of values, how do you calculate the median?
What is find the mean (average) of the two middle numbers?
Find the Interquartile Range (IQR) for this set: 2, 5, 8, 10, 12, 15, 20.
What is 10?
On a box-and-whisker plot, what is the name of the two points at the very ends of the whiskers?
What are the minimum and maximum?
A box plot has a median of 20, a Q1 of 15, and a Q3 of 30. What percentage of the data falls between 15 and 30?
What is 50%?
A distribution where the left side is a mirror image of the right side
What is a symmetric distribution?
A set of 5 numbers has a mean of 10. If four of the numbers are 8, 12, 10, and 5, what is the fifth number?
What is 15?
If Data Set A has a higher IQR than Data Set B, what does that tell you about the data in Set A?
What is the middle 50% of the data is more spread out?
In a dot plot, what do we call a data point that is far away from the rest of the distribution?
What is an outlier?
If you add an outlier that is much smaller than the rest of the data, what happens to the mean of the set?
What is the mean decreases?
When most data is on the left but a "tail" extends to the right, the data is described as this.
What is skewed right?
Which measure of center is most "resistant" to outliers, meaning it doesn't change much if one value is much higher than the others?
What is the Median?
If a data set has a range of 0, it means all the numbers in the set are this.
What is the same?
If a histogram shows most of its data on the left side with a long "tail" stretching to the right, how would you describe its shape?
What is Skewed Right?
True or False: You can determine the exact mean of a data set just by looking at its box plot.
What is False? (A box plot only shows the 5-number summary, not individual values).
A graph that uses bars to show frequency of data within specific intervals.
What is a histogram?