SYMBOL-IC THINKING
MEAN GIRLS (AND MEDIANS TOO!)
SPREAD THE WORD
THE RELATIONSHIP STATUS: ITβS COMPLICATE
PI HARD
100
The meaning of this symbol.
π
Sample Size
100
Find the mean of the following numbers: 5, 10, 15, 20, 25.
15
100
The difference between the first quartile (Q1) and the third quartile (Q3) is known as this.
IQR or Inter-Quartile Range
100
Is the relationship positive or negative?
Positive coorelation
100
What is the standard shortened value of Pi?
3.14
200
The meaning of this symbol.
π
Population Mean
200
The data set {2, 5, 7, 10, 12, 15}. What is the mode?
No Mode
200
Find the interquartile range (IQR) of the data set: 4, 5, 7, 8, 10, 12, 14, 16.
IQR = 7
200
Is the relationship strong, moderate, or weak?
Weak
200
Pi is classified as this type of number because it never ends and never repeats.
Irrational Number
300
The meaning of this symbol.
sx
Sample Standard Deviation
300
When a data set has extreme outliers, this measure of center is the best choice
The median
300
Find the range of this data set: 12, 20, 15, 30, 25.
Range = 18
300
The coorelation coefficient of a regression line is r=-0.79. Is the relationship strong, moderate, or weak?
Moderate
300
In which ancient civilization was an early approximation of Ο first recorded?
Ancient Egypt
400
The meaning of this symbol.
π₯Μ
Sample mean
400
If a dataset is skewed left, is the mean greater than or less than the median?
The mean is less than the median
400
This measure of spread describes the average distance of data points from the mean.
Standard Deviation
400
The coorelation coefficient of a regression line is r=1. Is the relationship strong, moderate, or weak?
Strong
400
Using Ο β 3.14, what is the circumference of a circle with a radius of 5?
31.4
500
The meaning of this symbol.
π
Population Standard Deviation
500
Find the mean, median, and mode for this data set: 1, 2, 2, 3, 4.
(What are Mean = 2.4, Median = 2, and Mode = 2?)
500
If the standard deviation of a data set is 4, what is the variance?
Variance = 16
500
The linear regression equation of a relationship is Predicted y = 2.65 - .005 x. What is the slope of the equation?
-.005
500
A circular pool has a circumference of 31.4 feet. What is its radius?
r=5 feet