Knowledge Base

Solution 34691: Correcting a Domain Error When Calculating a 1-Prop Z-Interval on the TI-84 Plus C Silver Edition Graphing Calculator.

When trying to calculate a 1-Prop Z-Interval, I get a domain error on my TI-84 Plus C Silver Edition graphing calculator?

When calculating a 1-Prop Z Interval and the number of trials and the number of successes are given it is important to input the trials in n and the number of successes in x if this done incorrectly the calculator will display error domain.

Please Note: The successes number should not be larger than the number of trials.

Example: The Confidence interval for a population proportion is .95, with 1682 successes out of 2589 trials.

1) Press [STAT] [►] [►].
2) Select [A:1-PropZInt...].

3) Press [1] [6] [8] [2] [▼].
4) Press [2] [5] [8] [9] [▼].
5) Press [.] [9] [5] [▼].
6) Select [CALCULATE].
7) Press [ENTER].

Please see the TI-84 Plus C Silver Edition guidebook for additional information.