Question

if i post a statistics question can anyone answer it

Answer 1

I suppose that would depend on what the question was.

Answer 2

i will post it and you tell me

Answer 3

sounds like a plan

Answer 4

a certain brand of candies have a mean weight of 0.8604g and a standard deviation of o.052 based on a sample of a package conatining 441 candies the package label stated that the net weight is 376. 5 g (if every package has 441 candies the mean wieght of the candies must exceed 376.5/441 = 0.8537 for the net contents to weigh 441 at least 376.5g

if 1 candy is randomly selected find the probability that it weighs more than 0.8537g or greater is

Answer 5

Well, you could calculate the z-score of the desired weight

\[ Z = \frac{0.8537 - 0.8604}{0.052} \]
since 0.8604 g is the sample mean and 0.052 g is the sample standard deviation

Then you would use a z-score chart to find the area to the right of that particular value in your bell curve.

Answer 6

crap there is more there is a part b

Answer 7

And what might that be?

Answer 8

if 441 candies are randomly selected find the probability that their mean of 0.8537g or greater is

Answer 9

okay for the first part i came up with .5478

Answer 10

That seems about right

Answer 11

For the second part, you do essentially the same calculation but for the standard deviation you would use 0.052 / sqrt(441). That value is called the standard error of the mean.

Answer 12

oh okay i will try it out

Answer 13

i will show you to make sure we are on the same page i sorta understand it

Answer 14

Okay

Answer 15

i might seem like a moron but i dont think i am putting it in right

Answer 16

How are you calculating the z-score?

Answer 17

i was trying it this way but its wrong \[\frac{ 0.052 }{ \sqrt{441}}\]

Answer 18

No, you do (0.8537-0.8506)/ (0.052 / sqrt(441) )

Answer 19

2.1?

Answer 20

i got twenty one do i move the decimal one over

Answer 21

Doing that calculation gives me -2.7

Answer 22

i must have missed a number or typed it wrong lol

Answer 23

so you would then use the z-score chart to find the probability that z > -2.7. It should be very high.

Answer 24

i know thats why i figured i was doing something wrong

Answer 25

.9956 is my answer

Answer 26

2.7 i looked at and the 00

Answer 27

That looks about right.

Answer 28

thank you sooooooo much i appreciate it you were such a big help all i have is one more and then i am done :) thank you again

Answer 29

No problem