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Question Help in a study, researchers compared the variability in product of a particular piece of equipment to a known analyfic capability equipment under consideration. 28.7 The 95% confidence interval is from (Round to three decimal places as needed.) to decide whether product consistency could be improved. The folowing deta were obtained for 10 batches of product Preliminary test resuts sugpest the data are normaly disibued and that ortance interval trte process varaerof he pac of 29.9 28.8 29.4 29.2 28.8 30.2 29.8 29.3 29.3 Enter your answer in each of the answer boxes
math   Statistics-And-Probability   
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Answer #1

First we need to find the sample mean. The sample mean is

293.4 -- 29.34 10 7n

Here we have x=29.34, σ=0.504, n =10 Level of significance: a/2 -0.025 z,-1.96 Critical value: The requried confidence interval is: Ī-- .--29.34 ± (0.504* 1.96/sqrt(10)) 29.34 +0.312 -(29.028,29.652) Excel function for critical value: NORMSINV(1-0.025) Hence, the required confidence interval is (29.028,29.652)

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