The two-way table below describes the members of the U.S Senate in a recent year.
If we select a U.S. senator at random, what's the probability that the senator is a Democrat?
A study among the Piria Indians of Arizona investigated the relationship between a mother's diabetic status and the number of birth defects in her children. The results appear in the two-way table.
What proportion of the women in this study had a child with one or more birth defects?
A random sample of U.S. adults was recently asked, "Would you support or oppose major new spending by the federal government that would help undergraduates pay tuition at public colleges without needing loans?" The two-way table shows the responses, grouped by age.
Do these data provide convincing evidence of an association between age and opinion about loan-free tuition in the population of U.S. adults?
A survey of 4826 randomly selected young adults (aged 19 to 25) asked, "What do you think are the chances you will have much more than a middle-class income at age 30?" The two-way table summarizes the responses.
Choose a survey respondent at random. Define events G: a good chance, M: male, and N: almost no chance. Find
A random sample of 88 U.S. 11th- and 12th-graders was selected. The two-way table summarizes the gender of the students and their response to the question "Do you have allergies?" Suppose we choose a student from this group at random.
What is the probability that the student is female or has allergies?
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(c)
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The two-way table summarizes data on the gender and eye color of students in a college statistics class. Imagine choosing a student from the class at random. Define event A: student is male and event B: student has blue eyes.
Copy and complete the two-way table so that events A and B are mutually exclusive.
Researchers carried out a survey of fourth-, fifth-, and sixth-grade students in Michigan. Students were asked whether good grades, athletic ability, or being popular was most important to them. This two-way table summarizes the survey data.
Suppose we select one of these students at random. What's the probability that: The student is a sixth grader or a student who rated good grades as important?