A Logger Knows the Average Time for His Cutting Machine

question 235

Short Answer

A logger knows the average time for his cutting machine to cut 20 trees is 9.8 minutes. A new machine on the market claims to cut the trees in less than 9.8 minutes. A random sample of 25 test runs on the new machine yielded a mean of 8.5 minutes with a standard deviation of 1.5. Does the sample data suggest the new machine cuts faster than the logger's machine? Test at the = 0.05 level. Assume the cutting time is normally distributed and interpret your results.
Test Statistic = ______________
____________________________
The new machine ______________ cut faster than the logger's machine.

Differentiate between carriers of infectious diseases and active infections.

Recognize conditions as primary diseases or sequelae of past infections.

Identify the relationship between certain conditions and co-morbidities.

Understand the use and significance of various punctuation marks and symbols in medical coding.

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Definitions:

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