random sample problem: random sample of 28 soda cans

[johnnyb1997]

A simple random sample of 28 soda cans is selected, and it is found that the sample standard deviation of their contents is .135 ounces. with a significance level of 5% , we shall test a claim stating that the standard deviation of the contents of all soda cans is at most .127 ounces. assume the contents of all soda cans are normally distributed.


a) express the claim and its opposite in symbolic form
b) identify the null hypothesis and alternative hypothesis
c) compute the value of the test statistic, make a decision about H0 and state the conclusion.

 

[Ishuda]

A simple random sample of 28 soda cans is selected, and it is found that the sample standard deviation of their contents is .135 ounces. with a significance level of 5% , we shall test a claim stating that the standard deviation of the contents of all soda cans is at most .127 ounces. assume the contents of all soda cans are normally distributed.


a) express the claim and its opposite in symbolic form
b) identify the null hypothesis and alternative hypothesis
c) compute the value of the test statistic, make a decision about H0 and state the conclusion.

What are your thoughts? What have you done so far? Please show us your work even if you feel that it is wrong so we may try to help you. You might also read
http://www.freemathhelp.com/forum/threads/78006-Read-Before-Posting