Mathematics, 27.01.2020 19:31, Justus4215
Current research indicates that the distribution of the life expectancies of a certain protozoan is normal with a mean of 48 days and a standard deviation of 10.2 days. find the probability that a simple random sample of 49 protozoa will have a mean life expectancy of 49 or more days.
Answers: 2
is the random variable for lifespan of a protozoan and 
. Let 
be the mean of a sample from this distribution, so that 
.
and standard deviation 
by 
.
follows the standard normal distribution)
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