Essentials of Statistics for the B...
Solutions
Essentials of Statistics for the B...
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 of preferences is as follows:
| Design A | Design B | Design C | |
| 23 | 12 | 25 | n = 60 |
- a. What is the df value for the chi-square statistic?
- b. Assuming that the null hypothesis states that there are no preferences among the three designs, find the expected frequencies for the chi-square test.
a.
Given info:
For a computer keyboard, three different designs were developed by a researcher. A sample of size 60 were taken and obtained each individual tests for three keyboard and the favourite one was identified.
Calculation:
Degree of freedom is calculated by simply with relation.
b.
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