Question

can anyone help me with my survey for statistics?

Answer 1

Yes

Answer 2

u can?

Answer 3

Ask a question. Tell me more

Answer 4

So I conducted this survey with a sample size of 47, it was to find out whether reading contributes to GPA
I asked the following questions in order
GPA
How many hours do you read per week
how many hours do you study every week

-I must apply elementary probability (probability of event B and A)
-binomial probability
-confidence interval...
heres the link to the data
http://www.viewdocsonline.com/document/7dgay4

Answer 5

the yes and no replies were for 'whether they thought reading contributed to their gpa'

Answer 6

You need to organize the data better. It has not headings. What does Yes/No mean? Can you enter the data into a spreadsheet? What is 20 hours?

Answer 7

the first part is their GPAs
the second part was the response to whether or not they thought reading contributed to their gpa,
the third part was the number of hours they spend reading per week
the last is the number of hours they spend studying

Answer 8

I am not clear on what you mean by applying elementary probability. You might find the average number of hours studying or reading and look at whether those who fell above the average had a higher GPA. That is not what I would call probability, but the way I would analyze the data

Answer 9

yeaht hen i have to apply 'confidence interval' and im quite lost

Answer 10

If you can calculate a mean and sd, then a confidence interval is just another formula
Mean +/-(sd/sqr(n))*1.96
that will give you the 95% confidence limits

Answer 11

like to get that, what data would i use? the gpa, reading per week, studying per week...?

Answer 12

You can get the 95% confidence limits for the GPA, time reading, and time studying

Answer 13

okay and the binomial distribution for the yes and no response?

Answer 14

assume it is random, so the probability is 50/50 yes/no
You have 47 scores so expect 23.5 yes and 23.5 no. How many do you get?
It looks like 36 yes and 11 no. That would be a very low probability and you can say significantly more read than not. How does the prof want you to calculate binomial values? Table, calculator, spreadsheet, by hand

Answer 15

it would lend itself more to chi square than binomial

Answer 16

what was that?

Answer 17

Chi square is another test in stat. if you have not learned it yet, ignore it for now

Answer 18

i dont think i have and she would proabily want it by spreadsheet table orhand

Answer 19

Excel has a formula for the binomial, so you can calclulate 36 yes and 11 no with a probability of .5

Answer 20

Do you have a table that give binomial probabilities in your text?

Answer 21

uhm do u know how to do it on excell?

Answer 22

look up the binomial function

Answer 23

do you mean p(r)=C_n,r P^r q^n-r

Answer 24

no. look up the binomdist function. Insert, function, binomial

Answer 25

isnt that like binompdf(n.pr) on the calculator?

Answer 26

I do not know your calculator. if you know it, use it with simple numbers as a test

Answer 27

okay

Answer 28

what should i use for my 'r'

Answer 29

N=47, r=11 or 36, p = .5

Answer 30

oh i got like .00012376

Answer 31

That seems like a reasonable number. Got to run

Answer 32

okay is ther anyway to contact u