A Telephone Company Prepared Four Versions of a Set of Instructions

question 46

Essay

A telephone company prepared four versions of a set of instructions for placing collect calls. The company asked a sample of 1600 people which one of the four forms was easiest to understand. In the sample, 425 people preferred Form A, 385 preferred Form B, 375 preferred Form C, and 415 preferred Form
D.At the 5% level of significance, can one conclude that in the population there is a preferred form?

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Definitions:

Hydrogen Ions

Positively charged ions (protons) of hydrogen that play a crucial role in chemical reactions and pH balance in biological systems.

pH

A scale used to specify the acidity or basicity of an aqueous solution, with values ranging from 0 (acid) to 14 (basic).

Bromecresol Purple

A pH indicator dye that changes color from yellow to purple over a pH range of approximately 5.2 to 6.8, commonly used in laboratory settings.

Buffers

Substances that help maintain the pH balance in a solution, resisting changes in pH when acids or bases are added.