Assuming that the null hypothesis states that there are no preferences among the three designs, find the expected frequencies for the chi-square test.
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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 the preferences is as follows:
n=60
| Design A | Design B | Design C |
| 23 | 12 | 25 |
Assuming that the null hypothesis states that there are no preferences among the
three designs, find the expected frequencies for the chi-square test.
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- 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 the preferences is as follows: DESIGN A DESIGN B DESIGN C n=60 23 12 25a. What is the df value for the chi-square statistic?b. Assuming that the null hypothesis states that there are no preferences among thethree designs, find the expected frequencies for the chi-square testA researcher wishes to see if the activities people usually do on a weekend which is listed below to combat stress are equally distibuted among office workers. A sample of 100 office workers is selected, and the folllowing data are obtained. At α=0.05, can it be concluded that there is no preference? What is the null hypothesis?A communications company has developed three new designs for a cell phone. To evaluate consumer response, a sample of 120 college students is selected and each student is given all three phones to use for one week. At the end of the week, the students must identify which of the three designs they prefer. The distribution of preference is as follows: Do the results indicate any significant preferences among the three designs? Compute Cohen’s w to measure the size of the effect.