Two types of plastics are suitable for use by an electronics component manufacturer. The breaking strength of these plastics is very important. From a random sample size of n1=18, and n2=16, we obtained that X1-bar=151.2, S1=1.4 and X2-bar=152.3, S2=1.65.
Calculate a 90% confidence interval on the difference in means.
With 90% confidence, what is the right-value of the two-sided confidence interval on the difference in means?
Your Answer:
Confidence interval :-
DF = 29
Lower Limit =
Lower Limit = -1.9976
Upper Limit =
Upper Limit = -0.2024
90% Confidence interval is ( -1.9976 , -0.2024 )
Right value = -0.2024
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