Stats quiz

A simple random sample of n measurements from a population is a subset of the population selected in a manner such that which of the following is/are true? (Select all that apply.)

Every sample of size n from the population has an equal chance of being selected., and Every member of the population has an equal chance of being included in the sample.

Which of the following are possible examples of sampling distributions? (Select all that apply.)

mean trout lengths based on samples of size 5, average male height based on samples of size 30

A numerical descriptive measure of a sample is a sample statistic

s^2, s, p^, x bar

A population parameter is a numerical descriptive measure of a population .

μ,σ, p

What is a sampling distribution

A sampling distribution is a probability distribution for a sample statistic .

How can relative frequencies be used to help us estimate probabilities occurring in sampling distributions?

Relative frequencies can be thought of as a measure or estimate of the likelihood of a certain statistic falling within the class bounds.

A statistical inference is A/An conclusion about the value of a population parameter based on information from the corresponding sample statistic and the associated probability distributions .

estimation, testing

How do frequency tables, relative frequencies, and histograms showing relative frequencies help us understand sampling distributions?

They help us visualize the sampling distribution by using tables and graphs that approximately represent the sampling distribution.

Which of the following are examples of a population? (Select all that apply.)

people in Colorado, antelope in Wyoming, and students in your school