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**lunaj** I am a little confused about a couple problems, i think because the word mean is used. Ill write them down. any help would be greatly appreciated!

**PROBLEM : The advertised weight of a certain candy bar is 2.13 oz. however the actual weight can vary to a normal distribution with a mean of 2.20 oz and stadard dev. of 0.04 oz. **

**1)** __what is the probability that an individual candy bar weighs between 2.18 and 2.22 oz.__

i found the z score for both so

2.22-2.13/ .04 and 1.18-2.13/0.4 i looked in teh table 2, subtracted them from each other and got .0934 so about 9 %??

I also assume that the CLT does not apply beause the sample is less than 10.

**2**) __what does the clt say about how these means will vary from sample to sample?__ I wasnt really sure, i just know that as the sample size increases it will be more "normal"

**3**) __calculate the probability that the sample mean of theses 5 candy bars falls between 2.18 and 2.22 oz.__

do i just do 2.18-2.20/0.04 ( and the same for 2.22) and subract the z scores? Similar to the first problem??

**4) **__how do you expect the prob. to change is the sample size were 40 instead? calculate the prob that the candy bar falls between 2.18 and 2.22?(d)__

I have no idea where 40 would go.

5) What if the origional population had been skewed instead of normal. which of the 3 ( Q's 3, 4 and 1) probablilities that you calculated remains approx. correct?

help!

thanks so much!