quiz scores\nwhich interval does the median test score fall within?

Explanation:

Step1: Calculate total number of students

$1 + 1+7 + 4+6 + 1=20$

Step2: Determine position of median

Since $n = 20$ (even), the median is the average of the $\frac{n}{2}=10$th and $(\frac{n}{2}+ 1)=11$th ordered - data values.

Step3: Find cumulative frequencies

For the interval $40 - 49$, frequency $f_1 = 1$, cumulative frequency $CF_1=1$. For the interval $50 - 59$, frequency $f_2 = 1$, cumulative frequency $CF_2=1 + 1=2$. For the interval $60 - 69$, frequency $f_3 = 7$, cumulative frequency $CF_3=2 + 7=9$. For the interval $70 - 79$, frequency $f_4 = 4$, cumulative frequency $CF_4=9 + 4=13$. The 10th and 11th values fall within the $70 - 79$ interval.

Answer:

$70 - 79$