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Category > Statistics Posted 15 Aug 2017 My Price 6.00

A journal published a study of the surface roughness of water pipes.

A journal published a study of the surface roughness of water pipes. An instrument measured the surface roughness (in micometers) of 40 sampled sections of coated interior pipe. Let x

¯

x¯ denote the sample mean. Assume that the surface roughness distribution has a mean of μ=1.65

μ=1.65 micrometers and a standard deviation of σ=0.8

σ=0.8 micrometers. Find the probability that x

¯

x¯ exceeds 1.75 micrometers.

Select one:

a. 0.3979

b. 0.2683

c. 0.2148

d. 0.4356

 

Please give Letter of answer and final answer

Answers

SophiaPretty
(5)
Status NEW Posted 15 Aug 2017 12:08 PM My Price 6.00

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