Question
In: Statistics and Probability
A manufacturing company produces electrical insulators. If the insulators break when in use, a short circuit...
A manufacturing company produces electrical insulators. If the insulators break when in use, a short circuit is likely to occur. To test the strength of the insulators, destructive testing is carried out to determine how much force is required to break the insulators. Force is measured by observing the number of pounds of force applied to the insulator before it breaks. The data shown below are from 30 insulators subjected to this testing:
|
Force |
|
1870 |
|
1728 |
|
1656 |
|
1610 |
|
1634 |
|
1784 |
|
1522 |
|
1696 |
|
1592 |
|
1662 |
|
1866 |
|
1764 |
|
1734 |
|
1662 |
|
1734 |
|
1774 |
|
1550 |
|
1756 |
|
1762 |
|
1866 |
|
1820 |
|
1744 |
|
1788 |
|
1688 |
|
1810 |
|
1752 |
|
1680 |
|
1810 |
|
1652 |
|
1736 |
- At the 0.05 level of significance, is there evidence that the population mean force required to break the insulator is greater than 1,500 pounds?
- What assumption about the population distribution is needed in order to conduct the t test in (a)?
- Construct a histogram or a boxplot, or a normal probability plot to evaluate the assumption made in (b).
- Do you think that the assumption needed in order to conduct the t test in (a) is valid? Explain.
Solutions
orchestra answered 1 year agoRelated Solutions
A manufacturing company produces electrical insulators. If the insulators break when in use, a short circuit...
A manufacturing company produces electrical insulators. If the
insulators break when in use, a short circuit is likely to occur.
To test the strength of the insulators, destructive testing is
carried out to determine how much force is required to break the
insulators. Force is measured by observing the number of pounds of
force applied to the insulator before it breaks. The following data
(stored in Force) are from 30 insulators subjected
to this testing:
At the 0.05 level of...
A manufacturing company produces electrical insulators. If the insulators break while in use, a short circuit...
A manufacturing company produces electrical insulators. If the
insulators break while in use, a short circuit is likely to occur.
To test the strength of the insulators, destructive testing is
carried out to determine how much force is required to break the
insulators. Force is measured by observing the number of pounds of
force applied to the insulator before it breaks. Data are available
in the worksheet labeled “Problem 1”
1. Construct a 95% confidence interval on population mean
force....
A manufacturing company produces electrical insulators. If the insulators break while in use, a short circuit...
A manufacturing company produces electrical insulators. If the
insulators break while in use, a short circuit is likely to occur.
To test the strength of the insulators, destructive testing is
carried out to determine how much force is required to break the
insulators. Force is measured by observing the number of pounds of
force applied to the insulator before it breaks.
At the ? = 0.05 level of significance, conduct a formal
hypothesis test to determine if there is evidence...
Otacnu Manufacturing Inc. builds electric insulators. If the insulators break when in use, a short circuit...
Otacnu Manufacturing Inc. builds electric insulators. If the
insulators break when in use, a short circuit is likely to occur.
To test the strength of the insulators, destructive testing in
high-powered labs is carried out to determine how much force is
required to break the insulators. The force is measured by
observing how many pounds must be applied to the insulator before
it breaks. The force measurements, collected from a sample of 30
insulators and stored in the Force are:...
A manufacturing company produces electric insulators. You define the variable of interest as the strength of...
A manufacturing company produces electric
insulators. You define the variable of interest as the strength of
the insulators. If the insulators break when in use, a short
circuit is likely. To test the strength of the insulators, you
carry out destructive testing to determine how much force is
required to break the insulators. You measure force by observing
how many pounds are applied to the insulator before it breaks. You
collect the force data for 30 insulators selected for the...
A manufacturing company produces electric insulators. You define the variable of interest as the strength of...
A manufacturing company produces electric insulators. You define
the variable of interest as the strength of the insulators. If the
insulators break when in use, a short circuit is likely. To test
the strength of the insulators, you carry out destructive testing
to determine how much force is required to break the insulators.
You measure force by observing how many pounds are applied to the
insulator before it breaks. The accompanying data represent the
amount of force required to break...
A manufacturing company produces electric insulators. You define the variable of interest as the strength of...
A manufacturing company produces electric insulators. You define
the variable of interest as the strength of the insulators. If the
insulators break when in use, a short circuit is likely. To test
the strength of the insulators, you carry out destructive testing
to determine how much force is required to break the insulators.
You measure force by observing how many pounds are applied to the
insulator before it breaks. The data shown below represent the
amount of force required to...
1. Jones Manufacturing is a newly established company that produces and sells components of electrical fixtures...
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A manufacturing company produces steel housings for electrical equipment. The main component part of the housing...
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equipment. The main component part of the housing is a steel trough
that is made out of a 14-gauge steel coil. It is produced using a
250-ton progressive punch press with a wipe-down operation that
puts two 90-degree forms in the flat steel to make the trough. The
distance from one side of the form to the other is critical because
of weatherproofing in outdoor applications. The company requires
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