A researcher wants to find out which type of pet is the most popular. She conducts a survey that asks this question of a random sample of U.S. adults in 2010 and a second independent sample in 2017. She then conducts a chi-square test of homogeneity to determine if there are statistically significant differences in the distribution of responses for these two years.
In this results table, the observed count appears above the expected count in each cell.
Year Dogs Cats Fish Snakes Total
1999 193 257.2 466 443.8 284
237.3 51 55.72 994
2010 324 259.8 426 448.2 193
239.7 61 56.28 1004
Total 517 892 477 112 1998
Chi-square Test Statistic DF Value P-Value
Chi-square 3 53.19187 <0.0001
If we included an exploratory data analysis with the test of homogeneity, the percentages most appropriate as part of this analysis for the Cat group are ________ .
a. 466/892 compared to 994/1998
b. 466/1998 compared to 426/1998
c. 466/892 compared to 426/892
d. 466/944 compared to 426/1004