Answered: Identify the type of sampling bias…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Question

Identify the type of sampling bias guaranteed to occur in each of the sampling schemes, based on the information provided. Some sampling schemes may incur multiple types of bias.

You are currently in a labeling module. Turn off browse mode or quick nav, Tab to items, Space or Enter to pick up, Tab to move, Space or Enter to drop.

A political poll is conducted by contacting people on landline phones. The pollsters
did not keep track of how many people they contacted who did not respond.

A political poll is administered by contacting people on landline phones. The pollsters
contacted 10,00010,000 households, and 23662366 individuals agreed to speak with the caller.

A political poll is conducted by setting up a booth at a local shopping mall and
inviting passersby to share their opinions.

A political poll asks the question, "If you found out that Candidate A did not
graduate from high school, would that change your opinion of how unintelligent
Candidate A is?"

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Definition Definition Measure of central tendency that is the value that occurs most frequently in a data set. A data set may have more than one mode if multiple categories repeat an equal number of times. For example, in a data set with five item—3, 5, 5, 29, 473—the mode is 5 because it occurs twice and no other value occurs more than once. On a histogram or bar chart, the element with the highest bar represents the mode. Therefore, the mode is sometimes considered the most popular option. The mode is useful for nominal or categorical data (e.g., the most common color car that users purchase), but it is problematic for continuous data because it is more likely not to have any value that is more frequent than the other.

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