An Izod Impact Test was performed on 20 specimens of PVC pipe. The sample mean is...

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Statistics

An Izod Impact Test was performed on 20 specimens of PVC pipe.The sample mean is ? = 1.25, and the sample ??? ??????? ? standarddeviation is ? = 0.25. You need to test if the true mean IzodImpact Strength is less than 1.5.
a.Write down the Null and Alternative Hypotheses to betested
b.What is the appropriate type of statistical test? Explain.
c.Construct a 95% ?????????? ???????? and test the Hypotheses.Clearly interpret the test result.
d.Test the Hypotheses using the Test Statistic method. Do youget the same answer as part (c)?
c. What is the ? ????? for the test? Do you get the same answeras parts (c) and (d)?

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4.0 Ratings (712 Votes)

a As we are testing here whether the true mean Izod ImpactStrength is less than 15 therefore the null and the alternativehypothesis here are given asb As the sample size here is 20 is small and the See Answer

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