A rods manufacturer makes rods with a length that is supposed to be 12 inches. A quality control technician sampled 12 r

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A rods manufacturer makes rods with a length that is supposed to be 12 inches. A quality control technician sampled 12 r

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A Rods Manufacturer Makes Rods With A Length That Is Supposed To Be 12 Inches A Quality Control Technician Sampled 12 R 1
A Rods Manufacturer Makes Rods With A Length That Is Supposed To Be 12 Inches A Quality Control Technician Sampled 12 R 1 (183.08 KiB) Viewed 75 times
A rods manufacturer makes rods with a length that is supposed to be 12 inches. A quality control technician sampled 12 rods and found that the sample mean length was 12.09 inches and the sample standard deviation was 0.26 inches. The technician claims that the mean rod length is more than 12 inches. ✓ Select What type of hypothesis test should be performed Left-tailed z-test Ex: 0.123 0 Right-tailed t-test Two-tailed z-test What is the test statistic? Left-tailed t-test Ex: 20 What is the number of degrees of freedom? Does sufficient evid Select A at the a = 0.05 significance level to support the technician's claim?
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