Unit One:Exploring One Variable Data
S: Shape
O: Outlier
C: Center
S: Spread
How do we describe distribution?
R = 0
What is no linear relationship?
Sampling method that divides the population into subgroups that are based on certain characteristics
What is stratisfied sampling?
This distribution has a non-fixed number of trials
What is a geometric distribution?
If a sample size (n) is larger or equal to 30, the sampling distribution of the sample mean will be approximately normal
What is Central Limit Thereom?
Median and IQR
What are resistant to outliers?
y-hat = a+bx
What is LSRL?
Asking for volunteers instead of selecting individuals
What is voluntary bias?
The probability of this event does not change from other events before it
What is independent events?
Standard deviation of a sampling distribution
What is standard error?
x-value - mean / sd
What is Z-Score formula?
y-observed - y-predicted
What is residuals?
The subject and researcher do not know the assignment of the treatment.
What is double-blind?
What is conditional probability?
If a sample size (n) is larger or equal to 30, the sampling distribution of the sample mean will be approximately normal
What is Central Limit Thereom?
How do we interpret standard deviation?
Residuals in a random pattern
What is a good fit to data?
Anything in the survey design or procedures which might induce a particular response
What is response bias?
This type of distribution has a fixed number of trials
What is binomial distribution?
The tendency for sample statistics to vary from one sample to another
What is sampling variability?
Q1 - 1.5(IQR)
Q3 + 1.5(IQR)
The degree to which there is a linear correlation between the two variables
What is correlation coefficient?
Selecting every #th (ex. 5th) individual from a list.
What is systematic sampling?
These variables can take on any value
What are continuous variables?
This distribution is used when comparing two proportions from independent variables?
What is sampling distribution of a difference in proportions?