Question

which of the following scenarios contain biased samples? select all that apply. select all that apply: to estimate the mean project completions of technicians in his company, donald collects data by recording completions from the warehouse area. kenneth wants to estimate the mean market shares of his company. he collects data by selecting a random group of coworkers within one department. to estimate the male to female ratio of the residents of her city, janice collects data by recording the sex of every 50th resident after selecting a random starting point on a list of residents. amy wants to estimate the mean accidents of coworkers at her company. she collects data by recording the accidents of every 25th coworker on the list of coworkers after a randomly selecting first coworker.

Answer 1

The scenarios that contain biased samples are Donald's and Amy's scenarios.

According to the given scenarios, the biased samples are:

1. Donald's scenario: He is collecting data by recording completions from the warehouse area. This sample may be biased because it only includes completions from the warehouse area, and may not represent the entire population of technicians in the company.
2. Amy's scenario: She is collecting data by recording the accidents of every 25th coworker on the list of coworkers after randomly selecting the first coworker. This sample may be biased because it only includes accidents from specific coworkers and may not represent the entire population of coworkers at the company.

The other two scenarios, Kenneth's and Janice's, involve random selection and do not appear to have biased samples.

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