Ch. 7 Vocabulary
An estimator whose value approaches the value of the parameter estimated as the sample size increases
What is consistent estimator
The number of values that are free to vary after a sample statistic has been computed; used when a distribution consist of a family of curves.
What is degrees of freedom
A specific numerical value estimate of a parameter.
What is point estimate
A sample chosen at random from the population that is, for the most part representative of the population.
What is unbiased estimator
A range of values used to estimate a parameter
What is interval estimate
Tells you how much your results will differ from the real population value.
What is margin of error
A family of bell shaped curves based on degrees of freedom, similar to standard normal distribution with the exception the the variance is greater then 1.
What is t distribution
When something in the data is assumed to be able too come to conclusion.
What is assumptions
Statistics that yield good performance even when data is drawn from a wide range of probability distributions that are largely unaffected by outliers.
What is robust
The probability that a parameter lies within the specified interval estimated of the parameter.
What is confidence level
An estimator that has the smallest variance of all the statistics that can be used to estimate a parameter.
What is relatively efficient estimator
A specific interval estimate of a parameter determined by using data obtained from a sample and the specific confidence level of the estimate.
What is confidence interval
A statistic used to estimate a parameter event the outcome of probability experiment.
What is estimator
A probability distribution obtained from the values of (n-1)s^2/o^2 When random samples
What is chi-square distribution
The process estimating the value of a parameter From information obtained from a sample.
What is estimation
A part of a whole, represented by a fraction, a decimal, or a percentage.
What is proportion