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14 Cards in this Set
 Front
 Back
The value of the estimator approaches the value of the ____ as the sample size increases.

Parameter


The absolute difference between a parameter and its point estimator:

Sampling error


A range of values within which the population parameter is expected to occur:

Confidence interval


What are the 3 point estimates?

1) xbar (quantitative)
2) s 3) pbar (qualitative) 

Symbol in calculator for the point estimate of a population mean:

xbar


What happens to the t distribution as the degrees of freedom increase?

The t distribution approaches the standard normal distribution.


How do you calculate the margin of error?

Za/2(sigma/sqrt n)
Ta/2(sigma/sqrt n) 

What are the 3 point estimators?

1) mu (quantitative)
2) sigma 3) p (qualitative) 

Symbol in calculator for the point estimate of a population standard deviation:

Sx


How do you calculate an interval estimate?

Point estimate + Margin of Error
Point estimate  Margin of Error 

When estimating the population mean with a small sample, the t distribution may be used with ______ degrees of freedom.

n1


A confidence interval ____ in width as the sample size is increased.

Decreases


Unknown Population Standard Deviation and a Small Sample

1SampTInterval


The _____ is more spread out and flatter at the center than is the standard normal distribution.

t distribution
