Organizing Data
This measure of center is more resistant to outliers than the mean.
What is the median?
This type of bias occurs when you ask people to participate in your sample.
What is voluntary response bias?
This type of random variable requires a set number of trials.
What is a binomial random variable?
Neither the subject nor those who measure the response variable know which treatment a subject received.
What is a double blind experiment?
How to identify outliers for univariate data
What is Q1 - 1.5(IQR) and Q3 + 1.5(IQR)?
To calculate, subtract the mean of the distribution from the observed x, then divide by the standard deviation.
What is the z-score (or standardized value)?
randInt(1, 9, 3)
What is the calculator command for generating 3 random numbers from 1 to 9?
Events that have no outcomes in common, and can never occur simultaneously, for which the addition rule is used.
What are mutually exclusive (or disjoint) events?
A common form of blocking for comparing just two treatments.
What is matched pairs?
How to find the expected value of a discrete random variable
What is the mean of the random variable found by summing the products of the values of x and their given probabilities?
This rule helps determine if data is normally distributed by checking the number of observations within each interval.
What is the 68-95-99.7 (or Empirical) rule?
When some groups in the population are left out of the process of choosing a sample
What is undercoverage?
What is it called when the outcome of one event has no effect on the next event?
What is independence?
The 3 basic principles of experimental design.
What are control, randomize, and replicate?
Describe the interpretation of "a z-score of -3.45"
What is the z-score is 3.45 standard deviations below the mean?
The square root of the variance.
What is standard deviation?
The population is divided into groups. Some groups are randomly selected and all individuals in the chosen groups are sampled.
What is cluster sampling?
When an event does NOT occur, we call it what?
What is the complement?
This experimental design involves the random assignment of units to treatments which are carried out separately within each group of units known to be similar in some way that is expected to affect the responses.
What is block design?
The mean and standard deviation of a Standard Normal Curve
What is a mean of 0 and a standard deviation of 1?
This calculator command can be used to find the area under a normal distribution and above an interval.
What is normcdf?
This type of sampling design assigns each individual of a population a unique number first, then uses a random number generator to choose the sample.
What is a Simple Random Sample?
When transforming a random variable by adding a constant, c, these values in the distribution change.
The effects of two variables on the response cannot be distinguished from each other.
What is confounding?
The symbols for population proportion and sample proportion
What is p and p-hat?