Measures of Central Tendency
How do you calculate the mean?
Dot Plots show __(how many?)_ piece of data.
EVERY
Histograms are used for __(size)__ sets of data.
Larger
What are the two main measures of center?
Mean and Median
What are the two main measures of spread?
Interquartile Range and Standard Deviation
How do you calculate the median?
Arrange numbers from smallest to largest, then find the middle number.
Dot plots are typically used for __(size)__ sets of data.
Smaller
Histograms show a ____ of numbers, vs showing every single value.
Range
Which measure of center is used for normally distributed data?
Mean
Which measure of spread is used for symmetrically distributed data?
The Standard Deviation
What is the mode?
The number that occurs the most often.
What is the 5-number summary?
Minimum, First Quartile, Median, Third Quartile, Maximum
What is frequency?
The amount of times something happens / how often something occurs.
Which measure of center is LEAST affected by outliers?
The median.
Which measure of spread is LEAST affected by outliers?
The Interquartile Range.
How do you find the median with an even set of data?
Find the Mean(average) of the two middle values.
How much % of the data is in 1 quartile?
25%
Histograms are better used for data values that cover a wide ____ of numbers.
Range
Skewed right means the tail is longer on the...
Skewed left means the tail is longer on the left.
Skewed right means the tail is longer on the right.
How do you calculate the interquartile range?
Q3 - Q1
How do you find the first and third quartile?
Find the medians of the upper and lower half.
Box plots show a brief ___ of the ___.
Summary, Spread
What is the first step to making a dot plot, box plot, and a histogram?
Title and labels!!
The shape of the data can be described three different ways. What are the three ways we describe the shape of the data?
Symmetric, Skewed Left, Skewed Right
What is Standard Deviation?
The typical distance data values are away from the mean.