Question

total students surveyed: 300
less than $20:
save: 60 students
spend: 40 students
$20 to $50:
save: 80 students
spend: 70 students
more than $50:
save: 30 students
spend: 20 students
what is the marginal relative frequency of students who save part of their allowance?

Explanation:

Step1: Recall the formula for relative frequency

The formula for relative frequency is \( \text{Relative Frequency}=\frac{\text{Frequency of the category}}{\text{Total frequency}} \).

Step2: Identify the frequency of students who save and the total number of students

From the table, the number of students who save (frequency of the "Save" row) is \(170\), and the total number of students surveyed is \(300\).

Step3: Calculate the marginal relative frequency

Using the formula \( \text{Relative Frequency}=\frac{170}{300}\approx0.57\)

Answer:

\(0.57\)