## Statistics: Informed Decisions Using Data (4th Edition)

$5.5$%
An IQ of at least 130 means IQ $\geq$ 130. So we make the sum of the frequencies of the last three classes: $8+2+1=11$. Total number of students in the sample: $2+3+13+42+58+40+31+8+2+1=200$. Now: $\frac{11}{200}=0.055=5.5$%.