Answer: A: The 14- to 17-year olds spent more hours studying, on average, last weekend than the 10- to 13-year olds
Step-by-step explanation:
From the given line plot we observe the total number of hours spent by 10 to 13 years olds is 1+1+2+4+4+4+4+6+6+7+8= 47 hours and for 14 to 17 years old is 4+4+4+4++6+7+8+9+9+10+10= 105 hours.
Median for 10 to 13 years = 4hours
Median for 14 to 17 years = 7 hours
Average hours spent by 10 to 13 years =47÷2=23.5
Average hours spent by 14 to 17 years =105÷2=52.5
Range of hours spent by 10 to 13 years = 8-1=7
Range of hours spent by 14 to 17 years =10-4=6
Among all the given options option A is right.
A: The 14- to 17-year olds spent more hours studying, on average, last weekend than the 10- to 13-year olds
