A doctor is interested in the time it takes broken bones of a given size and type to heal. A random sample of 17 single arm breaks?occurring?in victims in their twenties took an average of 53 days to heal with a standard?deviation?of 5?days. Is there sufficient evidence to say the mean healing time is less than 56 days??Use???= 0.05 to?test?this claim. Assume normality.
What type of test do you need to?perform?
A test on a population proportion
A test on the sample population
A test on the population mean
A test on the sample mean
I believe the answer is D but just want to make sure?
This question was answered on: Sep 18, 2020
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