a teacher put all her students quiz scores up on the representation below. quiz scores which interval does…

a teacher put all her students quiz scores up on the representation below. quiz scores which interval does the median test score fall within?

a teacher put all her students quiz scores up on the representation below. quiz scores which interval does the median test score fall within?

Answer

Explanation:

Step1: Calculate total number of students

Add up the frequencies: $2 + 3+2 + 7+3 + 5=22$

Step2: Determine position of median

Since $n = 22$ (even), the median is the average of the $\frac{n}{2}=11$th and $(\frac{n}{2}+ 1)=12$th ordered - data values.

Step3: Find cumulative frequencies

For $40 - 49$: $2$; for $50 - 59$: $2 + 3=5$; for $60 - 69$: $5+2 = 7$; for $70 - 79$: $7 + 7=14$. The $11$th and $12$th values fall within the $70 - 79$ interval.

Answer:

$70 - 79$