A two-way frequency table shows that out of 80 students, 30 are in the 9th grade and play soccer. What is the joint relative frequency of 9th-grade students who play soccer? Express your answer as a decimal. The joint relative frequency is ________.
Answer & Analysis
Analysis
Question Analysis
This question assesses the understanding of joint relative frequency and its calculation. The joint relative frequency is the ratio of the number of 9th-grade students who play soccer to the total number of students.
Key Concept Explanation
Joint relative frequency is the proportion of a combination of two variables (in this case, 9th-grade students who play soccer) to the total number of the entire population (all students surveyed). It is usually expressed as a fraction, decimal, or percentage.
Step-by-step Solution
1. Identify the number of 9th-grade students who play soccer: 30
2. Identify the total number of students: 80
3. Calculate the joint relative frequency:
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