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Scott, MIT Graduate
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Experience:  MIT Graduate (Math, Programming, Science, and Music)
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The breaking strengths of cables produced by a certain

Customer Question

The breaking strengths of cables produced by a certain manufacturer have a mean, , of pounds, and a standard deviation of pounds. It is claimed that an improvement in the manufacturing process has increased the mean breaking strength. To evaluate this claim, newly manufactured cables are randomly chosen and tested, and their mean breaking strength is found to be pounds. Assume that the population is normally distributed. Can we support, at the level of significance, the claim that the mean breaking strength has increased? (Assume that the standard deviation has not changed.)
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Submitted: 1 year ago.
Category: Homework
Expert:  GLENN replied 1 year ago.

Thak you for using this site. Can you post the complete questions? How many questions are there all in all? Please reply.

Customer: replied 1 year ago.
I need t p value.
The value of the test statistics
Is the claim supported?
Expert:  GLENN replied 1 year ago.

Do you have some data included for this problem?

Customer: replied 1 year ago.
1825 pounds 12 randomly chosen and the 1849 is the breaking strength with a .01 level of significants
Expert:  GLENN replied 1 year ago.

how about the standard deviation?

Customer: replied 1 year ago.
85 pds
Expert:  GLENN replied 1 year ago.

Do you still have other stat questions aside from this?

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