For the Formula for Calculating the Confidence Level with Known $\sigma / \sqrt{n}$

question 54

Multiple Choice

For the formula for calculating the confidence level with known standard deviation, the value ________ represents the value of a standard normal random variable with a cumulative probability of 1 - α / 2.

• A)\(\sigma / \sqrt{n}\)
• B)\(z_{a / 2}\)
• C)\(\bar{x}\)
• D)\(x_{i}-\bar{x}\)

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