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Two types of plastics are suitable for use by an electronics component manufacturer. The breaking strength...

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 95% confidence interval on the difference in means, assuming that the population variances are equal.

With 95% confidence, what is the left-value of the two-sided confidence interval on the difference in means?

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Math   Statistics-And-Probability   
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Answer #1

Confidence interval is :-






Lower Limit =
Lower Limit = -2.1654
Upper Limit =
Upper Limit = -0.0346
95% Confidence Interval is ( -2.1654 , -0.0346 )

Left Value = -2.1654

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