Solution Found!
A random sample has been taken from a normal distribution.
Chapter 8, Problem 28E(choose chapter or problem)
A random sample has been taken from a normal distribution. Output from a software package follows:
Variable N Mean SE Mean StDev Varianc Sum
x ? ? 1.58 6.11 ? 751.40
(a) Fill in the missing quantities.
(b) Find a 95% CI on the population mean.
Questions & Answers
QUESTION:
A random sample has been taken from a normal distribution. Output from a software package follows:
Variable N Mean SE Mean StDev Varianc Sum
x ? ? 1.58 6.11 ? 751.40
(a) Fill in the missing quantities.
(b) Find a 95% CI on the population mean.
ANSWER:Step 1 of 4
Given,
SE Mean,
Standard deviation,
Sum,
For and s, the mean and standard deviation of a random sample from a normal distribution with unknown variance , a Confidence Interval on is given by,
where is the upper percentage point of the t distribution with n – 1 degrees of freedom