Homework Help: statistics

Posted by sayera on Monday, May 28, 2012 at 10:25am.

a manufacturer of detergent claims that the contents of the boxes in the market weigh on average at least 16 oz.. the distribution of weights is known to be normal with a standard deviation of 0.4 oz. to test the claim of the manufacturer a random sample of 16 boxes were weighed and it was found that the sample mean weight is 15.84 oz. test at levels of significance of 5%, 10% and the null hypothesis that the population mean weight is at least 16 oz.

statistics - PsyDAG, Monday, May 28, 2012 at 10:48am
Z = (score-mean)/SEm

SEm = SD/√n

Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportions (.05 and .10) for one-tailed test related to the Z score.

Answer this Question

Related Questions

statistics - a manufacturer of detergent claims that the contents of the boxes ...
statistics - a manufacturer of bicycle tire has developed a new system which he ...
Statistics - (a) If 10 auto insurance claims are taken at random, use the ...
Grade 3 - A grocery store shelf can hold 4 large boxes of laundry detergent. The...
finite math - The weights of boxes of Brand Z cereal were found to be normally ...
math - The weights of boxes of Brand Z cereal were found to be normally ...
math - The weights of boxes of Brand Z cereal were found to be normally ...
math - The weights of boxes of Brand Z cereal were found to be normally ...
Statistics - A manufacturer of a low-tar cigarette claims that their cigarettes ...
Statistics - An automobile in surer has found that repair claims have a mean of...

For Further Reading

First Name:
School Subject:
Answer: