AP STAT PROJECT UNIT 3

In a survey conducted to gather opinions on a new mobile app, participants were asked to submit their feedback voluntarily through an online form. The survey primarily collected responses from individuals who were enthusiastic about the app, as those less interested chose not to participate. What type of bias is most likely present in this survey?

• Over coverage Bias

• Voluntary Bias

• Under coverage bias

• Non-response Bias

The random selection of subjects to reduce bias in experiments/surveys

• Randomization

• Correlation

• Response Bias

• Variable

Denise is investigating the opinions of students at her high school on the new lunch menu proposed by the school board. Which of the following is her population of interest?

• All members of the school board

• All teachers at her school

• All students at her high school

• All students in the school district

A sample of students will be selected from all the students at a high school. Which of the following sampling methods is least likely to produce a representative sample of the students?

• Randomly choose ten classrooms in the school and use all the students in those classrooms for the sample.

• Divide the students into the four class years (freshman, sophomore, junior, senior) and randomly select students from each year in proportion to the number of students in each year.

• From a numbered list of all student names, randomly choose a starting point and then choose every tenth student on the list.

• From a randomly chosen home football game, choose every fifth student who enters the field.

A sample where respondents have the choice to respond to a survey

• Voluntary response

• Control group

• Convenience

• Sampling bias

An experiment when subjects are randomly assigned treatments within a block

• Matched pairs design

• Stratified random sample

• Randomized block design

• Simple random sampling

What is a benefit of using a random sample for an observational study?

• The random sample allows for a single treatment

• A cause effect relationship can be determined.

• The results of an observational study can be generalized to the whole population.

• There are no benefits

The owner of a retail store distributed a customer-satisfaction survey by handing it to people as they came through one of the doors to the store one day. Of those handed out, 30 were completed and returned. Should the results of the survey be generalized to the population of all customers of the store?

• 
  Yes, because the sample size is large.

• Yes, because only people entering the store were given the survey.

• Yes, because the sample was random.

• No, because a random sample from all customers of the store was not selected.

Jacob wants to investigate the opinions of teenagers in the country, ages 13-18 years, about time spent playing video games. Which of the following samples is most likely to generalize to his population of interest?

• A sample of attendees of a gaming convention

• A sample of people ages 13 to 18 in Jacob's neighborhood

• A nationwide sample of people ages 13 to 18

• A sample of people who click on a link in an online gaming site

A teacher needs to collect data on the educational background of all 20 of the students in their class. Which of the following is the best method to use for data collection?

• A census

• A cluster sample

• A simple random sample

• A stratified sample