Question

A psychologist wishes to conduct a study on the effects of music deprivation on high school students. A high school class consists of the 30 students numbered in the list below. The researcher establishes a treatment group of 15 students who will have their portable music players replaced by experimental players that present the sound of water running. The control group of 15 students will all get regular portable music players, stuffed full of their favorite songs. Use the line of random numbers below to select the first five students to receive the treatment. What is the name of the fourth student selected?

59784 44312 15954 09233 00046 74318 02610 57396 16843 38454

Answer 1

@phi @mathmate

Answer 2

@amistre64

Answer 3

pls help!

Answer 4

@mary.rojas

Answer 5

Do you have the list of students, with student numbers?
What's the range of the student numbers?

Answer 6

@phi @gypsy1274 @Preetha help her please?!

Answer 7

If the student numbers range from 1 to 30, then you can find the student using the random number N as follows:
Student number = (N mod 30) + 1
The fifth random number will correspond to the fifth student.

Answer 8

@music101 What class are you taking?

Answer 9

its review for algebra ii- this is random numbers thing...

Answer 10

@mathmate can u pls be more specific

Answer 11

@mary.rojas

Answer 12

@pgpilot326 @FutureMathProfessor

Answer 13

I need fourth student not fifth!!!

Answer 14

help!

Answer 15

@mathstudent55 please help

Answer 16

59784 44312 15954 09233 00046 74318 02610 57396 16843 38454

We need to start somewhere. Pick a spot. Maybe multiply the two numbers you land on and assign a place to start. Maybe pick the beginning "59" Multiply 5 and 9 to get 45 and start on value #45 and start assigning values.

Assigning values is a little trickier, since individual digits are two few and 2 at a time are two many. Perhaps you can use the flip-a-coin method.

0-4 are Music
5-9 are Otherwise
Starting from the 45th digit
#1 - 3 - Music
#2 - 3 - Music
#3 - 8 - Otherwise
#4 - 4 - Music
#5 - 5 - Otherwise
#6 - 4 - Music
#7 - 5 - Otherwise

There are many ways to proceed. This is just one.

Answer 17

start on 1st #? how abt 5?

Answer 18

I have to finish this and 6 more problems in 15 minutes!

Answer 19

because I have other assignments. so i'll quickly try t understand what u say

Answer 20

If the intent is to start with the first digit, fine do that.

59784 44312 15954 09233 00046 74318 02610 57396 16843 38454

Still assigning
0-4 Music
5-9 Otherwise

5 - Otherwise
9 - Otherwise
7 - Otherwise
8 - Otherwise
4 - Music

However, I do not believe this is a good random design. It may be what is required, but I don't like it. The problem is that if 30 students in your class do this experiment, all 30 will get the same result. What's the point of that? Anyway...

Answer 21

so then give me a good number to start with

Answer 22

hello???

Answer 23

I already did. That was the first version. You must randomize it and NOT control it.

Answer 24

that's the part I don't understand. im not that good w/ this randomization.. can u pls help me? what do u mean

Answer 25

do I just continue doing the same?? for the rest of the numbers and whichever lands up w/ the fourth music is my answer??

Answer 26

:( :(

Answer 27

wait... is the final answer kiefer??

Answer 28

Seriously, just put your finger down on the line of numbers and pick the first two digits you see. That's what I did. Multiplying those two gave me the first digit in the 50-digit sequence. When I hit the 50th digit, I started over again at the beginning.

Answer 29

so 5*9???

Answer 30

If you randomize the starting point, potentially there could be 50 different answers. If you just start at the beginning, the whole class possibly will get the same answer. This might be easier to grade and may be what the question intends. Hard to tell.

Answer 31

ok.. so help me out here. I choose the 1st 2 digits: 5 & 9. what then?

Answer 32

Yes, I got 5*9 = 45 and started with the 45th digit. You may get something else. Where did your finger land?

Answer 33

what d u mean 45th digit?

Answer 34

You have ten groups of five digits. That's 50 digits. Pick number 45.

Answer 35

ok 3 ?

Answer 36

how do I know what the next two digits are to multiply? is it 3*4 (the number before it)????

Answer 37

No more multiplying. The multiplication was just to pick the starting point. After that, encode the digits so that you can make a decision for each participant.

Answer 38

can u explain more pls?

Answer 39

the 45th digit was 3 right? that's what I got...

Answer 40

Okay, now what does "3" mean? Is that Music or Not Music?

Answer 41

yes music

Answer 42

I used 0-4 Music and 5-9 NotMusic
Maybe you want to use Even Music and Odd NotMusic

Answer 43

so what then???

Answer 44

Digit #45 now represents Student #1 which has been assigned "Music".
Move on to digit #46 and make a decision for Student #2

Answer 45

music again

Answer 46

because its another #3

Answer 47

right?

Answer 48

Yes. Student #2 receives the same assignment as Student #1.

Now, move on to digit #47 and make an assignment for Student #3. Just keep doing this until you get 15 assignments to one classification. Anything remaining will have to be assigned to the other class.

Answer 49

I got DRUSILIA! is that right

Answer 50

@tkhunny @mathstudent55