Question

Someone please I really need the help :( why aren't you people helping
Suppose a research team takes a simple random sample of 100 Parma
wallabies. In this sample, the tails of the wallabies have a mean length
of 46 centimeters and a standard deviation of 2.6 centimeters.What percent of the time would you expect a simple random sample of 100 Parma wallabies to have a sample mean that is not in the 95% confidence interval?

Answer 1

what are your ideas about it?

Answer 2

I think that is 5% because of 2.5(2)

Answer 3

its an oddly worded question thats for sure. are you interpreting the confidence interval as tho it pertains to 95% of the time?

Answer 4

idk honestly is from my book http://k12.kitaboo.com/k12/ebookpdf/maths05/17501_HS_PS_chapter06.pdf

Answer 5

all 32 pages eh :) which one are you on?

Answer 6

13

Answer 7

ok, page 11 discusses confidence intervals

spose we take some interval [a,b] such that 95% of the samples taken have a mean that fall somewhere in that interval ... then we would expect that 5% of the means to fall outside of it. seems like a fair thought to me.

Answer 8

mean μ=46,σ=2.6 is what I have

Answer 9

our 95% confidence interval is

.46 +- (1.96)(2.6/sqrt(100))

[-.0496, .9696]

we can be 95% confident that the true population parameter (the mean) will be someplace along that interval.

Answer 10

hmm, might have gone a little over board and divided by 100 :/

Answer 11

yeah either way my answer has to be in percentage

Answer 12

5% sounds good to me. but i have to say that it is more of an educated guess than anything else.

Answer 13

well my options are 10%
2.5%
5%
0%

Answer 14

yeah,im sticking with 5% then

Answer 15

alright thank you soo much :)

Answer 16

goodluck with it all :)

Answer 17

thank you :) how long will you be logged in for?

Answer 18

not long, its been a rough day and im exhausted.

Answer 19

oh alright :)