In a metal fabrication process, metal rods are produced that have an average length of 20.5meters with a standard deviation of 2.3 meters. A quality control specialist collects a randomsample of 30 rods and measures their lengths. a. Describe the sampling distribution of the sample mean by naming the model andtelling its mean and standard deviation. b. Suppose the resulting sample mean is 19.5 meters. Do you think that this sample result is unusually small? Explain.
In a metal fabrication process, metal rods are produced that have an average length of 20.5meters with a standard deviation of 2.3 meters. A quality control specialist collects a randomsample of 30 rods and measures their lengths. a. Describe the sampling distribution of the sample mean by naming the model andtelling its mean and standard deviation. b. Suppose the resulting sample mean is 19.5 meters. Do you think that this sample result is unusually small? Explain.
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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In a metal fabrication process, metal rods are produced that have an average length of 20.5meters with a standard deviation of 2.3 meters. A quality control specialist collects a randomsample of 30 rods and measures their lengths.
a. Describe the sampling distribution of the sample
b. Suppose the resulting sample mean is 19.5 meters. Do you think that this sample
result is unusually small? Explain.
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