AP Stats exam review
Q1 - 1.5(IQR)
Q3 - 1.5(IQR)
state the 1.5 IQR rule equations
-keep in mind that whatever points are below or above the results
you get, they are outliers!
If the z score is negative what it is that many standard deviations BELOW the mean
does that mean for standard
deviations from the mean?
If the z score is positive what it is that many standard deviations ABOVE the mean
does that mean for standard
deviations from the mean?
what is the basic interval equation statistic (+ or -) (critical value)(standardized error of statistic)
that you can use?
, What is another word for standard deviation
standardized error of statistic
what is the margin of error made up the critical value multiplied by the standardized error of statistic (std. dev.)
of?
what is the equation to find the Chi- chi-square test stat = (the sum of) ... (observed-expected)^2/expected
square test statistic?
Power is a statistical concept, NOT A NUMBER. It is the idea that
what is power? the MORE POWER you have the HIGHER ABILITY you have to state
a difference (or cause and effect) between H0 and HA.
describing quantitative data
S= shape (unimodal, bimodal, multimodal, symmetric)
O= outliers (left/right skewed, and where they are
located in context) C= center (state where the median
is and/or the mean)
when do you use SOCS? when do S= spread (state the range and the IQ range)
you use DUFS?
D= direction (positive or negative association)
U= unusual features (any outliers or clusters that break up the
distribution and pull the LSRL)
F= form (linear or curved association)
S= strength (weak, moderate, strong association)
what is the formula for conditional P(A|B) = P(A and B) / P(B)
probability?
how can we map out conditional a tree diagram!
probability and its percentages?
1. sample size increases
2. the significance level (a) increases
power will increase when...
3. standard error decreases
4. the true parameter value is farther from the null hypothesis
divide a population up into homogeneous groups (they all have
stratified random sample
something in common in each group), then select an SRS of
each group
divide a population into heterogeneous groups (they are
cluster random sample different to one another each group), then select an SRS of the
clusters and sample every individual in the selected clusters
systematic random sample select a random starting point, and then use a fixed, periodic interval to select
others
- collect data from individuals that are easy to access and does not
use any type of random sampling
convenience sample
A BAD WAY TO SAMPLE
finding probability of specific number of
when do you use PDF? success "what is the probability that 3
children..."
think of the P in PDF as the word "perfect"
Q1 - 1.5(IQR)
Q3 - 1.5(IQR)
state the 1.5 IQR rule equations
-keep in mind that whatever points are below or above the results
you get, they are outliers!
If the z score is negative what it is that many standard deviations BELOW the mean
does that mean for standard
deviations from the mean?
If the z score is positive what it is that many standard deviations ABOVE the mean
does that mean for standard
deviations from the mean?
what is the basic interval equation statistic (+ or -) (critical value)(standardized error of statistic)
that you can use?
, What is another word for standard deviation
standardized error of statistic
what is the margin of error made up the critical value multiplied by the standardized error of statistic (std. dev.)
of?
what is the equation to find the Chi- chi-square test stat = (the sum of) ... (observed-expected)^2/expected
square test statistic?
Power is a statistical concept, NOT A NUMBER. It is the idea that
what is power? the MORE POWER you have the HIGHER ABILITY you have to state
a difference (or cause and effect) between H0 and HA.
describing quantitative data
S= shape (unimodal, bimodal, multimodal, symmetric)
O= outliers (left/right skewed, and where they are
located in context) C= center (state where the median
is and/or the mean)
when do you use SOCS? when do S= spread (state the range and the IQ range)
you use DUFS?
D= direction (positive or negative association)
U= unusual features (any outliers or clusters that break up the
distribution and pull the LSRL)
F= form (linear or curved association)
S= strength (weak, moderate, strong association)
what is the formula for conditional P(A|B) = P(A and B) / P(B)
probability?
how can we map out conditional a tree diagram!
probability and its percentages?
1. sample size increases
2. the significance level (a) increases
power will increase when...
3. standard error decreases
4. the true parameter value is farther from the null hypothesis
divide a population up into homogeneous groups (they all have
stratified random sample
something in common in each group), then select an SRS of
each group
divide a population into heterogeneous groups (they are
cluster random sample different to one another each group), then select an SRS of the
clusters and sample every individual in the selected clusters
systematic random sample select a random starting point, and then use a fixed, periodic interval to select
others
- collect data from individuals that are easy to access and does not
use any type of random sampling
convenience sample
A BAD WAY TO SAMPLE
finding probability of specific number of
when do you use PDF? success "what is the probability that 3
children..."
think of the P in PDF as the word "perfect"
