Memory Quiz Flashcards
p^
Sample statistic
p
Population parameter
p0
Parameter used in null hypothesis
P-value
Probability of test statistic or more extreme happening by natural variation
Z
Standardized score
Z*
Upper p critical value (right tail)
-Z*
Lower p critical value (left tail)
H0
Null hypothesis
HA
Alternate hypothesis
n
Sample size
N
Population size
np^
successes expected in sample
nq^
failures expected in sample
np0
successes observed
nq0
failures observed
Square root (p^q^/n)
Standard error of sample population
Square root (p0q0/n)
Standard deviation of parameter in 1propZtest
Z*square root(p^q^/n)
Margin of error for 1propZtest
p^(+/-)Z*square root(p^q^/n)
1PropZInterval
(p^-p0)/square root(p0q0/n)
Test statistic for Z distribution|Z value in 1PropZTest
How do you find outliers in a set of data?
Lower: Q1-1.5IQR
Upper: Q3+1.5IQR
IQR=Q3-Q1
What is the most important difference between an SRS and a stratified random sample?
SRS: every element of population has same probability of being drawn
Stratified random sample creates homogeneous groups, then takes SRS
How do you tell the difference between an observational study and an experiment?
Observational study observes only- no treatment
Experiment imposes a treatment on subjects
Formula to find the slope of the LSRL
slope^=r(Sy/Sx)