In a survey of 200 students, 80 students are in the 10th grade and 120 students play soccer. The marginal relative frequency of 10th-grade students is _________ (express as a fraction in simplest form).
Answer & Analysis
Analysis
Question Analysis
This question tests the student's ability to calculate the marginal relative frequency from a given two-way frequency table. The marginal relative frequency is the ratio of the number of 10th-grade students to the total number of students.
Key Concept Explanation
Marginal Relative Frequency: It is the ratio of the number of students in a single variable category (e.g., 10th-grade students) to the total number of students in the population.
Step-by-step Solution
1. Identify the number of 10th-grade students: 80
2. Identify the total number of students: 200
3. Calculate the marginal relative frequency:
4. Simplify the fraction if necessary:
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