Science & Mathematics - 3 July 2007

Refer to the list of errors:
-2 -2 0 0 3 2 -10 2 -8 -1 0
1 0 -1 -1 1 0 4 1 1 -1 0
-1 0 4 1 0 2 4 3 6 4 3
2 -2 -2

Assuming that all such errors have a standard deviation of 2.5, construct a 95% confidence interval estimate of the mean of all such errors

i think the mean of the errors= 0.342857143 but i dont know how to do a confidence interval

2007-07-03 04:48:08 · 2 answers · asked by heffie130 1 in Mathematics

how much paracetamol does it take to overdose?

2007-07-03 04:44:38 · 24 answers · asked by o0meme0o 3 in Medicine

Here's the question:

The farmer's slurry tank is 50 metres from a stream. The farmer draws the tank on a map to show this distance. The scale of the map is 1:1250.

What is the distance between the tank and the stream on the map?

a) 2.5cm
b) 4cm
c) 25cm
d) 40cm

I need to know how you worked it out. This is the most important bit. Please don't just give me the answer!!!

Thanks alot

2007-07-03 04:41:07 · 11 answers · asked by RED 2 in Mathematics

simplify the expressions. state each property of exponents used.

(a^2)^3

thanks!

2007-07-03 04:38:00 · 10 answers · asked by Anonymous in Mathematics

I want a job to work from home in the field of mechanical Autocad drafting (both 2D & 3D). I have searched everywhere in the net but could not find anything satisfactory. I want to do the job for some extra earning for better economical support.

2007-07-03 04:37:56 · 5 answers · asked by Anonymous in Engineering

A- shifts the parent graph down one
B- shifts the parent graph up one
C- shifts the parent graph right one
D- shifts the parent graph left one

2007-07-03 04:37:26 · 6 answers · asked by Anonymous in Mathematics

And could it be done in theory, if not in practice?
If not in practice, is it because they're so expensive? I've read that they cost like 5 billion bucks per plant

2007-07-03 04:31:11 · 5 answers · asked by Anonymous in Engineering

Two motorcycles travel toward each other from Chicago and Indianapolis which are about 350 km apart, at rates of 110 and 90 km/h. They started at the same time. In how many hours will they meet?

2007-07-03 04:28:07 · 7 answers · asked by mandyyy 1 in Mathematics

A 2.0 g Samples of C2H2 (g) is burned in a bomb calorimeter at 25%. 23.8 kcal of heat energy are evolved. for the combustion of 1.0 mole of C2H2 (g) at 25 degrees C. Calculate the Delta E and Delta H.
I already know the answer just need to know how to set it up.

2007-07-03 04:22:43 · 2 answers · asked by Anonymous in Chemistry

it is found when running a DHA ( Detailed Hydrocarbon Analysis)

2007-07-03 04:22:14 · 3 answers · asked by Berto731 1 in Chemistry

(a) zinc carbonate
(b) zinc hydroxide
(c) zinc nitrate
(d) zinc oxide

2007-07-03 04:20:19 · 3 answers · asked by yuk 2 in Chemistry

2007-07-03 04:15:12 · 1 answers · asked by Imad D 1 in Engineering

is it true, i mean because wee all becoming immune to the antibiotic, well were not, but the bacteria is,
tell me
is we only have one left
what were gonna do after that?

just curious

2007-07-03 04:13:52 · 9 answers · asked by peek a boo 2 in Medicine

2007-07-03 04:12:38 · 2 answers · asked by rhea 1 in Chemistry

2007-07-03 04:07:47 · 6 answers · asked by blacknight887 1 in Geography

is te weather in egland going to suddenly get better or is it going to remain raining like the past three weeks??/

2007-07-03 04:04:13 · 4 answers · asked by Anonymous in Weather

2007-07-03 04:01:59 · 5 answers · asked by Anonymous in Chemistry

2007-07-03 04:01:01 · 7 answers · asked by Samantha 4 in Medicine

A 112.6g mass of unknown material is submersed in 102mL of water to yield a final volume of 126mL. The apparent density of the material is....?

I don't want to know the answer, just a brief explanation on how to solve this

2007-07-03 03:48:38 · 10 answers · asked by Liz 4 in Chemistry

that we cant see & travling @ the same speed twin earth any evidance of this other than the indians myan not shore of the spelling

2007-07-03 03:47:04 · 15 answers · asked by david p 3 in Astronomy & Space

Solve the system of equations using addition elimination method. . If the answer is a unique solution, present it was an ordered pair (x,y)

If not, specify whether the answer is no solution of infinitely many solutions

3x -2y = -7

-9x + 6y =21

Show all work

2007-07-03 03:46:18 · 10 answers · asked by CollegeYearRound 1 in Mathematics

science

2007-07-03 03:40:50 · 5 answers · asked by LOLU 1 in Physics

I was taught that there are equal number of electrons that spin clockwise as counterclockwise.This dosen't make sense.If you have one electron that spins CW next to one that spins CCW,all you would have to do is turn one upsidedown and they would both spin in the same direction.What do you think?

2007-07-03 03:29:33 · 8 answers · asked by just thinking 6 in Chemistry

2007-07-03 03:29:08 · 12 answers · asked by nia j 1 in Chemistry

the other day my son was digging up some rose bushes by our house, he found a cacoon about 2-3 inches down in the dirt. it's dark brown, about 3-4 inches long, as thick around as a plumper hotdog. if you look closely you can see a wing-like structure, so it will be some kind of butterfly or moth, but we'd like to know if anyone can help us identify the type. we've never known of any that burrow to morph. it's way too big to be a cycada. thanks for your help!

2007-07-03 03:26:24 · 2 answers · asked by glddrgn1969 1 in Zoology

2x^2 + 13x + 6 = 0
show detailed wovkings to get the BEST ANSWER.

2007-07-03 03:25:57 · 7 answers · asked by Anonymous in Mathematics

2007-07-03 03:17:53 · 7 answers · asked by roxy 1 in Weather

i think tat it is a way of wasting extra money.... on just trying to build up a world on moon......
dont,you also think so...........

2007-07-03 03:17:21 · 8 answers · asked by Billa. 2 in Astronomy & Space

2007-07-03 03:13:20 · 13 answers · asked by Damo 2 in Mathematics

and am in on my own and its really bad out side and am staring to get scared. i need some1 to talk to me to keep my mind of the storm. i want my mummy ;-( boo hoo

2007-07-03 03:10:54 · 13 answers · asked by shell 5 in Weather