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Unformatted text preview: 1 Exam 3 Lecture Review Statistics 221 1. A certain brand of fishing line claims to have an average breaking strength of 30 pounds. A group of fishermen become angry because this brand of line seems to break so easily and test 25 randomly selected lines of this brand. The mean breaking strength is 27.994 pounds with a standard deviation of 0.846 pounds. A plot of the data follows. Do these data provide sufficient evidence for the fishermen to conclude that the average breaking strength is less than claimed? 1. A certain brand of fishing line claims to have an average breaking strength of 30 pounds. A group of fishermen become angry because this brand of line seems to break so easily and test 25 randomly selected lines of this brand. The mean breaking strength is 27.994 pounds with a standard deviation of 0.846 pounds. A plot of the data follows. Do these data provide sufficient evidence for the fishermen to conclude that the average breaking strength is less than claimed? A. What type of study is this? a.Observational study b.Completely randomized experiment c. Matched pairs experiment 1. A certain brand of fishing line claims to have an average breaking strength of 30 pounds. A group of fishermen become angry because this brand of line seems to break so easily and test 25 randomly selected lines of this brand. The mean breaking strength is 27.994 pounds with a standard deviation of 0.846 pounds. A plot of the data follows. Do these data provide sufficient evidence for the fishermen to conclude that the average breaking strength is less than claimed? A. What type of study is this? a.Observational study b.Completely randomized experiment c. Matched pairs experiment 1. A certain brand of fishing line claims to have an average breaking strength of 30 pounds. A group of fishermen become angry because this brand of line seems to break so easily and test 25 randomly selected lines of this brand. The mean breaking strength is 27.994 pounds with a standard deviation of 0.846 pounds. A plot of the data follows. Do these data provide sufficient evidence for the fishermen to conclude that the average breaking strength is less than claimed? B. Should we perform a test of significance or obtain a confidence interval estimate? a.Test of significance b.Confidence interval 1. A certain brand of fishing line claims to have an average breaking strength of 30 pounds. A group of fishermen become angry because this brand of line seems to break so easily and test 25 randomly selected lines of this brand. The mean breaking strength is 27.994 pounds with a standard deviation of 0.846 pounds. A plot of the data follows. Do these data provide sufficient evidence for the fishermen to conclude that the average breaking strength is less than claimed?...
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 Spring '10
 BRUCEJAYCOLLINGS
 Statistics, Normal Distribution, Statistical hypothesis testing, pounds, mean breaking strength

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