Download How Do I Know What to Do

Math 20-2
Statistics
Statistics Review:
But How Do I Know What to Do?
Math 20-2
If You’re Given…
 A long list of data points



A frequency table
Two different means
Two different standard
deviations
And Asked to Find…
 Mean, median, standard
deviation

A frequency table

Mean, median, standard
deviation

A histogram

A frequency polygon

Compare

Sketch normal
distributions
Compare


Sketch normal
distributions
Then Do This…
Math 20-2
Statistics

A diagram of a normal
distribution curve, with
percentages marked in it,
plus mean and 
Mean, standard deviation,
and a data value
Any 3 of mean, standard
deviation, data value, and
z-score
Mean, standard deviation,
and a data value of two or
more different sets of data
One or two z-scores


Mean, standard deviation,
and one or two data values


Mean, standard deviation,
and one or two data values


Mean, standard deviation,
and percentage above or
below
Results of a survey






Percentage of data
above, below, or
between given data
values
Z-score

The last one of these

Which one is better
relative to the group


Percentage of data
below, above, or
between
Percentage of data
above, below, or
between
Number of
objects/people above,
below, or between
Data value

Margin of error

% Confidence interval

Confidence interval in
number of people
Confidence level

Math 20-2
Statistics