A researcher has developed three different designs for a computer keyboard. A sample of n+60 participants is obtained, and each individual tests all three keyboards and identifies his or her favorite....

A researcher has developed three different designs for a computer keyboard. A sample of n+60 participants is obtained, and each individual tests all three keyboards and identifies his or her favorite. The frequency distribution are as follows: Design A – 23, Design B – 12 and Design C – 25 Use a Chi-square test to determine whether there are significant preferences. 1. What is the expected frequency? *