Margin of Error for One Sample Counts per Unit

Use the Margin of Error for Two Independent Counts per Unit to determine a sample size for a confidence interval. Select DOE > Sample Size Explorers > Confidence Intervals > Margin of Error for One Sample Counts per Unit. Explore the trade offs between sample size, significance, and the margin of error for your interval.

Interval Explorer for One Sample Counts per Unit Settings

Set study assumptions and explore sample sizes using the radio buttons, text boxes, and menus. The profiler updates as you make changes to the settings. Alternatively, change settings by dragging the cross hairs on the profiler curves.

Interval Type

Lower Bound

Specifies a one-sided lower interval.

Upper Bound

Specifies a one-sided upper interval.

Interval

Specifies a two-sided interval.

Preliminary Information

Alpha

Specifies the confidence level, 1 - Alpha. The default alpha level is 0.05 for a 95% confidence interval.

Counts per Unit

Specifies the assumed counts per unit.

Interval Explorer for One Sample Counts per Unit Profiler

The profiler enables you to visualize the impact of sample size assumptions on the margin of error calculations.

Solve for

Enables you to solve for the sample size.

Bound

(Available when Interval Type is set to Lower or Upper Bound.) Specifies the lower or upper bound on the estimated variance.

Interval Width

(Available only when Interval Type is set to Interval.) Specifies the full width of the interval. With all other parameters fixed, interval width decreases as sample size increases.

Sample Size

Specifies the total number of observations (runs, experimental units, or samples) needed to construct your interval.

Interval Explorer for One Sample Counts per Unit Options

The Explorer red triangle menu and report buttons provide additional options:

Simulate Data

Opens a data table of simulated data based on the explorer settings. View the simulated response column formula for the settings used.

Make Data Collection Table

Creates a new data table that you can use for data collection. The table includes scripts to facilitate data analysis.

Save Settings

Saves the current settings to the Saved Settings table. This enables you to save a set of alternative study plans. See Saved Settings in the Sample Size Explorers.

Help

Opens JMP help.

Want more information? Have questions? Get answers in the JMP User Community (community.jmp.com).