A sample is selected from a population with µ = 30 and σ = 10.If the sample mean of M = 34 corresponds to z = +2.00,then the sample size is n = 25.

Question

Quizplus · Accepted Answer

We can use the formula for converting a z-score to a raw score:

z = (X - µ) / (σ / sqrt(n))

Plugging in the given values:

2.00 = (34 - 30) / (10 / sqrt(n))

Solving for n:

n = (10 / 2.00)^2 = 25

Therefore, the sample size is indeed n = 25.

A Sample Is Selected from a Population with µ =