Whenever the population standard deviation is unknown and the population has a normal or near-normal distribution, which distribution is used in developing an interval estimation?
A.standard distribution
B.z distribution
C.alpha distribution
D.t distribution
Answer:D
Whenever the population standard deviation is unknown and the population has a normal or near-normal distribution, which distribution is used in developing an interval estimation?
A.standard distribution B.z distribution C.alpha distribution D.t distribution