You are working part-time at a road construction firm. Your boss knows you are learning some statistics in your classes this semester and calls you into the office. She says, "We've taken sample densities from loads of asphalt we've gotten from our supplier. The information from their company says their process produces a consistent density with a population standard deviation (ơ) of 2.75 pounds per cubic foot. Here's the data we've collected. Can you give me an estimate of the average density (a confidence interval) that our supplier's process is producing? I want to be 85% confident of the range you provide."

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section: Chapter Questions
Problem 25SGR
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Related questions
Question
100%
145.84
141.53
143.85
145.91
154.48
152.34
141.42
153.04
146.92
144.83
146.89
144.46
144.67
148.95
148.73
148.76
146.78
141.8
146.9
149.32
146.3
147.74
146.93
144.2
145.78
142.91
143.33
141.81
144.33
141.21
144.94
143.51
150.77
148.02
138.38
146.17
141.29
144.32
145.44
146.98
144.28
149.18
143.73
145.87
146.76
145.23
145.98
146.25
145.86
147.47
146.07
Transcribed Image Text:145.84 141.53 143.85 145.91 154.48 152.34 141.42 153.04 146.92 144.83 146.89 144.46 144.67 148.95 148.73 148.76 146.78 141.8 146.9 149.32 146.3 147.74 146.93 144.2 145.78 142.91 143.33 141.81 144.33 141.21 144.94 143.51 150.77 148.02 138.38 146.17 141.29 144.32 145.44 146.98 144.28 149.18 143.73 145.87 146.76 145.23 145.98 146.25 145.86 147.47 146.07
You are working part-time at a road construction firm. Your boss knows you are learning
some statistics in your classes this semester and calls you into the office. She says, "We've
taken sample densities from loads of asphalt we've gotten from our supplier. The
information from their company says their process produces a consistent density with a
population standard deviation (ơ) of 2.75 pounds per cubic foot. Here's the data we've
collected. Can you give me an estimate of the average density (a confidence interval) that
our supplier's process is producing? I want to be 85% confident of the range you provide."
Transcribed Image Text:You are working part-time at a road construction firm. Your boss knows you are learning some statistics in your classes this semester and calls you into the office. She says, "We've taken sample densities from loads of asphalt we've gotten from our supplier. The information from their company says their process produces a consistent density with a population standard deviation (ơ) of 2.75 pounds per cubic foot. Here's the data we've collected. Can you give me an estimate of the average density (a confidence interval) that our supplier's process is producing? I want to be 85% confident of the range you provide."
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