Question

Use the lines from a random number table to select numbers to use in
each problem.
Choose 5 families to survey from a phone directory page with 950 names.
11873 57196 32209 67663 07990 12288 59245 83638 23642 61715

Answer 1

ive got not a clue what i need to do

Answer 2

Well f you don't know what to do how do we know how to help? We have no idea how to help when we don't know what the problem is asking...

Answer 3

Yeah, kinda unsure what the question is.

Answer 4

the question wants u pick "5 names" randomly from "950 names"

Answer 5

and it wants u use the given "random number table"

Answer 6

here is a screenshot of my book

Answer 7

this is the random number table :-
11873 57196 32209 67663 07990 12288 59245 83638 23642 61715

Answer 8

How do you use lines from a random table?

Answer 9

no idea

Answer 10

I think it means numbers within the same line like this message

Answer 11

assign "3 digits" for each name in the book

Answer 12

\(\color{red}{118}\)73 57196 32209 67663 07990 12288 59245 83638 23642 61715

Answer 13

this makes no sense to me at all :/

Answer 14

u wud pick the 118th name first

Answer 15

next, u wud pick the 735th name

Answer 16

next, 719

Answer 17

next, 632

Answer 18

lastly 209

Answer 19

Where are you getting the positions of the names?

Answer 20

Oh!

Answer 21

using the given random number table, u wud pick below names :-

1) 118 th name
2) 735 th name
3) 719 th name
4) 632 th name
5) 209 th name

Answer 22

every three digits.

Answer 23

yup ! cuz there are 950 names, we need 3 digits at the minimum

Answer 24

this is called "random assignment"

Answer 25

using the randome table, we can choose some method to assign the subjects to treatments randomly

Answer 26

But where does the 950 come from?
Is it the total possible combinations?
I doubt it since factorials grow huge.

Answer 27

there are a total of 950 names in the page right ?

Answer 28

u need some way to pick 5 ppl randomly from this group of 950 names

Answer 29

thats where the table generated using "random sequence generator" is handy

Answer 30

since the sequence of digits were random, u are sure that u wud be picking names randomly as well

Answer 31

Weird question no?

Answer 32

uhm may be, but i have seen these before lol

Answer 33

they cover these in statistics and data analysis

Answer 34

In CS you would simply use randrange (1,950)

Answer 35

Gives you a random number from. 1-950

Answer 36

yup ! that table was generated using the same funciton may be

Answer 37

Thanks a lot ganeshie

Answer 38

np :)

i think, since the table was sequence of "digits" it must have been generated using randrange(0, 9), and calling it multiple times for each digit...

Answer 39

Agreed and for every five digits put a white space

Answer 40

ahh that whitespace is just for readability..

Answer 41

ive read it somwhere lol, im not sure though :)

Answer 42

Thanks :)

Answer 43

ok can we make this into simpler terms for the slower ones ie me lol please

Answer 44

i think i kinda understand what @ganeshie8 was talking about

Answer 45

I think they are teaching you how to randomly select a sample.

In the old days, they used tables... now they would use a computer to generate the random numbers. So they seem to be teaching an old method... like learning how to multiply using a slide rule...

Answer 46

i just dont see why every 3 digits is a new name....

Answer 47

The table is a list of random numbers.

If you looked at any 1 digit, it would be any digit from 0 to 9

if you had 10 things and wanted to choose one of them randomly you would use the first digit in the table. But if you have 100 things, and you used only the first digit in the table you will end up picking only from the first 10 out of that 100

Answer 48

in other words, if you had 100 things, and used the first digit from the table, you would not be treating all 100 fairly... you would never choose any entry past the first 10 in your list.

however, if you picked *2* adjacent digits, they could be any number from 00 up to 99
that is 100 numbers. you choose two adjacent digits, read it as a 2 digit number, and use it to choose that item in your list. Example: your two digits are 33
you would choose the item labeled 33 in your list.

Answer 49

so because there are 950 entries 3 digits are used so i have to use 3 digits from each of the numbers?

Answer 50

yes.
if you use 3 digits grouped together, you could get any combination from 000 to 999
That is 1000 numbers.

if you used 2 digits, you would have 00 to 99, which is 100 numbers. You would never pick item 101 in your list (or any item past item 101) if you only used 2 digits.

Answer 51

oh ok that makes more sense now :) thanks @phi

Answer 52

notice that if you get the 3 digit combo 956 (for example) you would toss it, because you do not have 956 names. Just ignore that combination, and to on to the next 3 digits.

Answer 53

Sorry about the confusion @highschoolmom2010 :L
I guess I should try understanding your question better.