AP Stats Chapter 5 Sampling Design

Identify the sampling method:

32 sophomores, 35 juniors and 49 seniors are randomly selected from 230 sophomores, 280 juniors, 577 seniors at a certain high school.

• Systematic

• Cluster

• Convenience

• SRS

• Stratified

To ensure customer satisfaction, every 35th phone call received by customer service will be monitored.

• Systematic

• Cluster

• Convenience

• SRS

• Stratified

Identify the sampling method:

Calling randomly generated telephone numbers, a study asked 855 U.S. adults which medical conditions could be prevented by their diet.

• Voluntary Response

• Cluster

• Convenience

• SRS

• Stratified

Is this sample representative? Explain.

To determine the percentage of teenage girls with long hair, Teen magazine published a mail-in questionnaire. Of the 500 respondents, 85% had hair shoulder length or longer (USA Today, July 1, 1985).

• Yes; only teenagers who read Teen could respond. This does represent all teens.

• Yes; all teens had the opportunity to respond.

• No; only teenagers who read Teen could respond. This does not represent all teens.

• No; all teens had the opportunity to respond.

Is this sample representative? Explain. Oranges from an orchard need to be sampled to see if they are sweet enough for juice. The orchard has 25,000 orange trees. Each tree has at least 500 oranges. Claire decides to randomly choose 800 trees and test one orange from each tree

• Yes, each orange had an opportunity to be chosen since Claire chose the tree and orange randomly.

• Yes, a convenience sample works best in this situation.

• No, each orange had an opportunity to be chosen since Claire chose the tree and orange randomly.

• No; not every tree and orange had the opportunity to be chosen.

Which of the following would reduce the variability in sampling?

• Using a larger sample size

• Using a smaller sample size

• Assigning individuals randomly

• Using Judgement Sampling

Which of the following does NOT reduce bias in sampling?

• Preventing undercoverage

• Removing leading questions on surveys

• Randomizing participants

• Giving surveys to participants that you think are representative of the population

You are surveying from a group of 35 people using a simple random sample. You assign each member of the group a number, then select 3 of them using the random digits: 61424 20419 86546 00517. Which number is selected second?

• 42

• 4

• 20

• 19

A set of observations that constitute PART of the population.

• Statistic

• Census

• Population

• Sample

A quantity calculated from the observations in a SAMPLE.

• Parameter

• Study

• Statistic

• Observation