Concept explainers
In your opinion, how safe is the food you buy? CBS News polled 1048 U.S. adults and asked them the question below.
Overall, how confident are you that the food you buy is safe to eat: very confident, somewhat confident, not too confident, not at all confident?
The pie chart shows the responses to the question. You conduct a survey using the same question. The contingency table shows the results of your survey classified by gender.
How Confident Are You That the Food You But is Safe to Eat?
Gender | ||
Response | Female | Male |
Very confident | 96 | 160 |
Somewhat confident | 232 | 180 |
Not too confident | 56 | 52 |
Not at all confident | 12 | 4 |
3. At α = 0.01, perform a chi-square independence test to determine whether the variables response and gender are independent. What can you conclude?
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