Question

Identify the z* critical value for constructing a confidence interval for one proportion using these confidence levels. You can reference the t distribution table to answer this question.

Enter each answer to 3 decimal places.

90% confidence:

95% confidence:

99% confidence:

Answer 1

The z* critical value for constructing a confidence interval for one proportion at different confidence levels is 1.645 for 90% confidence, 1.96 for 95% confidence, and 2.576 for 99% confidence.

Step-by-step explanation:

To construct a confidence interval for one proportion, we need to determine the critical value (z*) at different confidence levels. The z* critical value for a 90% confidence level is 1.645, for a 95% confidence level is 1.96, and for a 99% confidence level is 2.576. These critical values can be found in the standard normal probability distribution table.

Answer 2

90% confidence:

1.645

95% confidence:

1.960

99% confidence:

2.576

Step-by-step explanation:

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