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Stats
quiz 2.4 2.5 3.1
18
Mathematics
Undergraduate 1
09/17/2009

Additional Mathematics Flashcards

 


 

Cards

Term
range
Definition
The range is the difference between the largest and the smallest observation.
Term
deviation
Definition
the difference between the observation and the mean
Term
Empirical Rule
Definition
If the distribution of the data is bell-shaped, then approximately:
68% of the observations fall within one standard deviation of the mean
95% of the observations fall within two standard deviations of the mean
99.7% of the observations fall within three standard deviations of the mean
Term
If mean is larger than median the graph will be
Definition
Skewed to the right
Term
Z score
Definition
observation - mean
divided by standard deviation
Term
if mean is less than the median graph is
Definition
skewed to the left
Term
larger standard deviation means
Definition
the spread is larger
Term
Mode
Definition
value in set that occurs most often
Term
Mean
Definition
The average
Term
Median
Definition
mid point of observations when ordered
Term
inter-quartile range
Definition
difference between Q3 and Q1
Term
z-score is a measure
Definition
of how many standard deviations an observation is away from the mean
Term
association
Definition
associationexists between two variables if a particular value for one variable is more likely to occur with certain values of the other variable
Term
explanatory variable
Definition
independent variable. It sets the way in which we classify our subjects and specifies what we hope “explains” the results of our survey or experiment.
Term
response variable
Definition
It is what is known as the dependent variable. The response variable is that which we are interested in studying.
Term
Sample Space
Definition
set of equally likely outcomes
Term
Event
Definition
the particular set of outcomes you care about
Term
probability and statement
Definition
means to multiply
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