Question

a) What percentage of 8th grade girls take the bus? Show all your
calculations.

b. What percentage of 8th grade boys walk to school? Show all your calculations.

C. How many 8th grade students bike to school on an average day?

D. Are boys or girls more likely to get to school on a bus? How do you know?

E. Assuming this survey was a good representation of 8th graders nationwide, if you surveyed 10,000 8th graders throughout the country, how many of them would you expect to say they get to school by walking? Show all your calculations to justify your answer.

Answer 1

Complete table in the right.

a) Percentage of 8th grade girls that take the bus:

Total number of girls in 8th grade: 162

Number of girls in 8th grade that take the bus: 78

If 162 is the 100%, use a rule of three to find the percentage corresponding to 78:

48.15% of the girls in 8th grade take the bus.

b) Percentage of 8th grade boys that walk to school:

Total number of 8th grade boys: 144

Number of boys in 8th grade that walk to school: 28

If 144 is the 100%, use a ruke of three to find the percentage corresponding to 28:

19.44% of the boys in 8th grade walk to school

c) 8th grade students that bike to school: 20 (Total in the table)

d) Number of boys in 8th grade that take the bus: 49

Number of girls in 8th grade that take the bus: 78

As the number of girls that takes the bus is greater than the number of boys that takes the bus, it is more likely that girls get to school on a bus.

e)

Total students in 8th grade survayed: 306

Students in 8th grade that walk to school: 48

Use a rule of three as follow to find how many of 10000 8th grade students you can expect walk to school:

You can expect that from 10,000 8th grade students 1,569 get to school by walking