Measuring Melting Point. The National Institute of Standards and Tech. nology (NIST) supplies "standard materials" whose physical properties are supposed to be known. For example, you can buy from NIST a copper sample whose melting point is certified to be 1084.80°C. Of course, no measure ment is exactly correct. NIST knows the variability of its measurements very well, so it is quite realistic to assume that the population of all measurements of the same sample has the Normal distribution with mean u equal to the true melting point and standard deviation o = ments on the same copper sample, which is supposed to have melting point 1084.80°C: MELT 0.25°C. Here are six measure 1084.55 1084.89 1085.02 1084.79 1084.69 1084.86 NIST wants to give the buyer of this copper sample a 90% confidence interval for its true melting point. What is this interval? Follow the fourstep process as illustrated in Example 16.3.

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NIST wants to give the buyer of this copper sample a 90% confidence
interval for its true melting point. What is this interval? Follow the fourstep
16.6 Measuring Melting Point. The National Institute of Standards and Tech
nology (NIST) supplies "standard materials" whose physical properties are
supposed to be known. For example, you can buy from NIST a copper sample
whose melting point is certified to be 1084.80°C. Of course, no measure-
ment is exactly correct. NIST knows the variability of its measurements very
well, so it is quite realistic to assume that the population of all measurements
of the same sample has the Normal distribution with mean u equal to the
true melting point and standard deviation o = 0.25°C. Here are six measure-
ments on the same copper sample, which is supposed to have melting point
1084.80°C: M MELT
4step
%3D
1084.55 1084.89 1085.02 1084.79 1084.69 1084.86
NIST wants to give the buyer of this copper sample a 90% confidence
interval for its true melting point. What is this interval? Follow the fourster
process as illustrated in Example 16.3.
Asten
Transcribed Image Text:NIST wants to give the buyer of this copper sample a 90% confidence interval for its true melting point. What is this interval? Follow the fourstep 16.6 Measuring Melting Point. The National Institute of Standards and Tech nology (NIST) supplies "standard materials" whose physical properties are supposed to be known. For example, you can buy from NIST a copper sample whose melting point is certified to be 1084.80°C. Of course, no measure- ment is exactly correct. NIST knows the variability of its measurements very well, so it is quite realistic to assume that the population of all measurements of the same sample has the Normal distribution with mean u equal to the true melting point and standard deviation o = 0.25°C. Here are six measure- ments on the same copper sample, which is supposed to have melting point 1084.80°C: M MELT 4step %3D 1084.55 1084.89 1085.02 1084.79 1084.69 1084.86 NIST wants to give the buyer of this copper sample a 90% confidence interval for its true melting point. What is this interval? Follow the fourster process as illustrated in Example 16.3. Asten
Ruler
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CL View Side by Side
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EE Multiple Pages
ID Synchronous Scrolling
Focus ImmeIsive
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Zoom 100%
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Reset Window Position
Immersive
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SOME COMMON VALJJES OF Z*
Confidence Level
Tail Level
60%
.20
.84
80%
.10
1.28
90%
.05
1.645
95%
.025
1.96
96%
.02
2.05
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.01
2.33
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2.576
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Transcribed Image Text:Ruler EOne Page CL View Side by Side Gridlines EE Multiple Pages ID Synchronous Scrolling Focus ImmeIsive Reader Side Zoom 100% New Arrange Split Switch Windows to Side Navigation Pane Page Width Window All Reset Window Position Immersive Page Movement Show Zoom Window SOME COMMON VALJJES OF Z* Confidence Level Tail Level 60% .20 .84 80% .10 1.28 90% .05 1.645 95% .025 1.96 96% .02 2.05 98% .01 2.33 99% .005 2.576 Focus W
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