A Sample of 250 Adults Tried the New Multigrain Cereal

question 137

Multiple Choice

A sample of 250 adults tried the new multigrain cereal "Wow!" A total of 187 rated it as excellent. In a sample of 100 children, 66 rated it as excellent. Using the 0.1 significance level, the researcher wishes to show that adults like the cereal better than children. Which of the following is the alternate hypothesis?

• A) H₁: π_A = π_C
• B) H₁: π_A < π_C
• C) H₁: π_A > π_C
• D) H₁: π_A ≠ π_C

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Definitions:

Blind Group Assignment

A method used in experiments where participants are randomly assigned to groups without knowing which group (e.g., experimental or control) they are in to reduce bias.

Random Group Assignment

A method used in experiments where participants are randomly assigned to different groups to ensure that each group has a similar composition at the start of the experiment.

Replication Crisis

A methodological issue in psychology and other fields indicating a lack of reproducibility of research findings, challenging the reliability of scientific literature.

Well-known Studies

Famous or widely recognized research projects or experiments in various fields of study.