STATS 7
In order to apply the Central Limit Theorem for Sample Proportions, the sample size must be large enough that the sample expects at least ____ successes and ____ failures
10, 10
A _______ is a survey in which every member of the population is measured.
Census
_________ Bias comes from asking questions that do not produce a true answer. -Confusing wording, misleading questions
Measurement
In a confidence interval, the margin of error provides information about how far the estimate is from the _______________.
population value
To create a confidence interval for a proportion population, one should add and subtract the margin of error to/from the ___________.
sample proportion
The confidence level measures the _______ rate of the method of finding confidence intervals.
success
Statistical inference always involves ________, so an important component of this science is measuring our uncertainty.
uncertainty
To keep track of parameters and statistics, parameters are represented by Greek characters while statistics are represented by _____________.
English letters
What are statistics sometimes called?
Estimators
-Bias is a measure of the _______. -Standard Error is a measure of _______.
-accuracy -precision
If it is being used to make an inference about a population, a good statistic should be ______ and ______.
-accurate -precise
The bias of a sampling distribution is measured by computing the distance between the _______ of the sampling distribution and the _________ parameter.
-center -population
What is an important difference between statistics and parameters? Statistics are _________, but parameters are typically _________.
-known -unknowable
-The _____ of all sample proportions always equals the population proportion. -The standard error will be _____ for larger sample sizes.
-mean -smaller
The symbol u represents a _________ and the symbol x (with a bar over it) represents a _________. -the mean is represented by _____
-parameter -statistic -x with a bar over it
A parameter is the measure of the __________ and a statistic is a measure of a ___________.
-population -sample
When applying the Central Limit Theorem for Sample Proportions, the value of the sample _______ can be substituted for p when calculating the standard error if the value of p is _______.
-proportion -unknown
A _________ is a numerical value that characterizes some aspect of the population.
Parameter
A ______ is a collection of people or objects taken from the population.
Sample
_______ Bias results from taking a sample that is not representative of the population. -Convenience sampling and voluntary response sampling
Sampling
______________ Sampling, SRS, involves randomly drawing people from the population without replacement. -If a scientific sampling technique is not done, we cannot learn anything about the population by looking at the sample data.
Simple Random
A _______ also called an Estimator is a number derived from the data.
Statistic
A method is called _______ when it has a tendency to produce an untrue value.
biased
Increasing the level of ________ increases the margin of error, and visa versa.
confidence
Statistical _______ is the art and science of drawing conclusions about a population on the basis of observing only a small subset of that population.
inference
To measure the quality of a survey, statisticians evaluate the ________ used for the survey.
method
What is a numerical value that characterizes some aspect of a population?
parameter
The _________ is the group of people or objects we wish to study.
population
What is the term for a group of objects or people to be studied?
population
When taking samples from a population and computing the proportion of each sample, the ________ proportion values are always the same.
population