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A glass manufacturer is testing the mean thickness of their most popular glass sheets. A sample...

A glass manufacturer is testing the mean thickness of their most popular glass sheets. A sample of 25 glass sheets is measured, and a mean thickness of 6.75 mm is found, along with a standard deviation of 0.27 mm. Use α = 0.10.

(a) Is it believable that mean glass sheet thickness is 7 mm?

(b) Is it believable that mean glass sheet thickness exceeds 6 mm?

Math   Statistics-And-Probability   
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TOPIC:One sample t-test for the population mean.

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