AP Statistics / Mr. Hansen
2/6/2001

Name: _________________________

Instructions: Mark all letters that apply. This is not the usual multiple-choice test. No penalty for guessing wrong.

1.

For the last several days, we have been studying a special kind of distribution known as a
(A) sampling distribution
(B) sample distribution
(C) distribution of parameters

2.

Let the symbol à denote your answer(s) to question #1. Whenever you see the symbol à in the quiz, mentally replace the symbol with the answer(s) that you marked in question #1.

The study of às is important because
(A) our class is about the use of statistics to estimate parameters, and às provide the link
(B) you can construct a à by making a histogram of the data points found in your sample
(C) we need to understand how to make the à narrow enough to answer our questions of interest within the desired degree of accuracy

3.

The à is
(A) a real-world distribution of observed values for a statistic
(B) an imaginary distribution of values that a statistic could take using various sample sizes
(C) an imaginary distribution of values that a statistic could take using a fixed sample size
(D) based on a variety of imaginary populations
(E) based on a single fixed population of interest

4.

In an experiment concerning the mean longevity of n white rats after they have been injected with a carcinogenic [cancer-causing] chemical, the à of the sample mean
(A) has a standard deviation approximately equal to that of the underlying longevity distribution, divided by the sample size, n
(B) has a standard deviation approximately equal to that of the underlying longevity distribution, divided by the square root of the sample size, Ön
(C) has to be assumed to come from an imaginary à that describes the means that all possible samples of white rats could have generated
(D) has to be assumed to come from an imaginary à that describes the means that all possible samples of n white rats could have generated