Multiple Choice
A sample of 20 items from a population with an unknown σ is selected in order to develop an interval estimate of μ. Which of the following is not necessary?
A) We must assume the population has a normal distribution.
B) We must use a t distribution.
C) Sample standard deviation must be used to estimate σ.
D) The sample must have a normal distribution.
Correct Answer:
Verified
Correct Answer:
Verified
Q19: In interval estimation, the t distribution is
Q38: An Excel printout of the descriptive
Q39: A sample of 200 elements from a
Q40: Which of the following best describes the
Q63: From a population with a variance of
Q71: An interval estimate is a range of
Q81: The value added and subtracted from a
Q82: You are given the following information obtained
Q85: The Highway Safety Department wants to study
Q111: A random sample of 81 children with