Question

I need help with a stats problem, I'll attach a picture of the problem

Answer 1

@jim_thompson5910

Answer 2

ok for part a), it might help to think of a population with 1000 people

why 1000? because if you use the data table, you'll find that in the year 1900, there are 0.121*1000 = 121 people who are at or under age 5. In the same year, there are 0.344*1000 = 344 people who are at or under age 15. The same applies for any age. You don't have to multiply by 1000, you can just look at the number after the decimal point and ignore the decimal point. Example: age 25 ---> 0.540 ---> 540 people at or under age 25.

Answer 3

now create a number line with the points A through G on it

A represents age 5 and under
B represents age 15 and under
C represents age 25 and under
D represents age 35 and under
E represents age 45 and under
F represents age 55 and under
G represents age 65 and under

Answer 4

the median is the midpoint of this entire data set

if each age group had an even number of people in it, then the midpoint would be where you expect it to be...in the middle

however, if you have more people in one age group compared to others, then the median will move

Answer 5

Yeah I dont understand any of what you're saying.

Answer 6

we have 121 people at or under age 5
we have 344 people at or under age 15

so we have 344-121 = 223 people between age 5 and 15 (excluding age 5, including age 15)
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we have 540 people at or under age 25
we have 344 people at or under age 15
so we have 540-344 = 196 people between age 15 and 25 (excluding age 15, including age 25)
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we do the same for each age gap to get this graph