Question

Find the critical value(s) for z or t.

Answer 1

The critical value for z or t depends on the desired confidence level, the standard deviation, and the sample size. It can be obtained from a standard normal distribution table or a calculator for z-distributions, and from a t-table or a calculator for t-distributions.

Step-by-step explanation:

The critical value for z or t depends on the desired confidence level, the standard deviation, and the sample size. For a z-distribution, the critical value is obtained from the standard normal distribution table or a calculator.

For a t-distribution, the critical value is obtained from a t-table or a calculator.

Example:

1. If we want a 95% confidence level for a z-distribution, the critical value is approximately 1.96.
2. If we want a 95% confidence level for a t-distribution with 15 degrees of freedom, the critical value is approximately 2.131.