Measures of Center
What is the average of a set of numbers called?
Mean
What is the probability of flipping heads on a fair coin?
1/2
Which graph is best for comparing categories?
Bar Graph
What is a group being studied called?
Population
What do we call a value much higher or lower than the others?
Outlier
Find the median: 3, 5, 8, 11, 14
8
What’s the probability of rolling an even number on a d20?
1/2
Which graph shows data changing over time?
Line graph
A smaller group taken from a population is called what?
Sample
Which measure describes how spread out data is?
Standard deviation
Find the mode: 2, 4, 4, 6, 7, 7, 7, 9
7
A bag has 3 red and 2 blue marbles. What is the probability of drawing a blue marble?
2/5
Which graph uses bars that touch?
Histogram
What sampling method gives every person an equal chance of selection?
Random sample
In a normal distribution, where are most data values located?
Near the mean
Find the mean: 5, 8, 10, 12, 15
10
Two coins are flipped. What is the probability of getting two heads?
1/4
Which graph shows relationships between two variables?
Scatterplot
What is it called when a survey favors one result?
Bias
What shape does a normal distribution have?
Bell shaped curve
Find the range: 6, 11, 18, 21, 25
19
A card is drawn from a deck. What is the probability of drawing a king?
4/52 or 1/13
Which graph displays median, quartiles, and outliers?
Box plot
True or False: Surveying only athletes about school sports gives an unbiased sample.
False
If the standard deviation is small, are the data spread out or clustered together?
Clustered together