Question

In a random sample of 70 people, it was found that 44 of them were fans of the New York Yankees. What is the margin of error for the true proportion of all individuals who are fans of the New York Yankees?
A. 0.0088
B. 0.058
C. 0.063
D. 0.116
E. 0.173

Answer 1

@jim_thompson5910

Answer 2

any ideas?

Answer 3

does it mention the confidence level at all?

Answer 4

that seems to be missing

Answer 5

no lol, thats exactly what it says

Answer 6

1 sec

Answer 7

ok

Answer 8

thats all it shows

Answer 9

ok let me think

Answer 10

alright

Answer 11

maybe there's other context somewhere?

the reason why the confidence level is important is because the larger the confidence level, the larger the margin of error is

Answer 12

theres nothing else, maybe the confidence level is one of the choices, idk

Answer 13

for instance, if the confidence level was 95%, then the margin of error would be ...


E = C*sqrt( (p*(1-p))/n )


E = 1.96*sqrt( (44/70*(1-44/70))/70 )


E = 0.11319363939728


E = 0.11319

Answer 14

but the confidence level is unknown

Answer 15

should i just guess..

Answer 16

it could be they're ignoring the critical value (based on the confidence level)

this is obviously wrong, but oh well

Answer 17

sqrt( (p*(1-p))/n )


sqrt( (44/70*(1-44/70))/70 )


0.05775185683534


0.058


that's one possibility

Answer 18

its not like it even really matters, i just wanna get it right to have it right, ill just go with that.

Answer 19

The mean biology score of all undergraduate students at a college in a given year is 67.8, with a standard deviation of 11.5. What is the standard error of the mean for a sample of 70 students?

Answer 20

is there a formula for that

Answer 21

use

SE = sigma/sqrt(n)

Answer 22

sigma?

Answer 23

sigma is the standard deviation

Answer 24

oh lol sorry i suck at stat

Answer 25

\[\large \text{sigma} = \sigma\]

Answer 26

its fine, that's why you practice

Answer 27

true lol, so much formulas to remember though..

Answer 28

11.5/67.8(70) ?

Answer 29

0.116