Organizing Data
This type of random variable requires a fixed number of trials.
What is a binomial random variable?
The type of significance test used for the mean of a single population when the standard deviation of the population is unknown.
What is a T test (or T procedure)?
randInt(1,9,3)
What is the calculator command for generating 3 random numbers from 1 to 9?
The type of variable where the probability distribution assigns probability as the area under the density curve above a specific interval.
What is a continuous random variable?
The formula to calculate the one-sample z statistic.
What is z = (x bar minus mu sub o) divided by (sigma divided by the square root of n) ?
What is the coefficient of determination (or r squared)?
Events that have no outcomes in common and can never occur simultaneously, for which the addition rule is used.
What are disjoint events (or mutually exclusive events)?
Used to determine whether the difference between samples means differs significantly from the hypothesized difference between population means
Two sample t-test
Applying a logarithmic transformation to both variables causes this type of model to become linear.
What is a power model?
Describe the difference between undercoverage bias, voluntary response bias and nonresponse bias.
Undercoverage means a group of the population is left out of the sample.
Voluntary response means the sample opinions are voluntarily given, not random.
Nonresponse bias comes from some of the randomly chosen people not responding to the survey.
The condition involving the population size that must be satisfied to use sigma divided by the square root of n as the standard deviation of a sampling distribution.
What is 'the population is at least 10 times the sample size'?
This idea that the relative frequency of an event will converge on the probability of the event, as the number of trials increases
Law of large numbers
This calculator command can be used to find the area under a normal distribution
What is normalcdf?
The actual y is typically this distance away from the the LSRL
What is s? (or the standard deviation of residuals)
Comparison, Random Assignment, control and replication
these are the Principals of Designing Experiments
The standard deviation of a binomial random variable of 1, 2 and 3.
What is sigma sub x = The square root of {(the square of the difference between x sub 1 and mu multiplied by p sub 1) + (the square of the difference between x sub 2 and mu multiplied by p sub 2) + (the square of the difference between x sub 3 and mu multiplied by p sub 3)} ?
A __________ occurs when the researcher rejects a null hypothesis when it is true. The probability of committing a Type I error is called the significance level, and is often denoted by α.
Type I error