1-Sample Poisson Rate
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Stat > Basic Statistics > 1-Sample Poisson Rate

This procedure calculates a confidence interval for the occurrence rate and the mean number of occurrences of events in a one-sample Poisson process, and conducts a hypothesis test that the occurrence rate is equal to a specified value.

A Poisson process describes the number of occurrences of an event in a given length of time, area, or volume, etc.

For example,

·    The daily number of telephone calls to a customer service center

·    The number of flaws in a length of wire

Dialog box items

One or more samples, each in a column: Choose if you have raw data in columns.

Sample columns: Enter the columns containing the sample data.

Frequency columns (optional): If you have one column of unique values and a separate column of their frequencies, enter the column containing the frequencies.

Summarized data: Choose if you have summary values for the sample size and total number of occurrences.

Sample size: Enter a single value for the sample size.

Total occurrences: Enter the total number of number of occurrences. If you enter multiple values, Minitab performs a separate analysis for each sample, and applies the single value in Sample size to all summarized samples.

Perform hypothesis test: Check to perform the hypothesis test that the occurrence rate is equal to a specified value.

Hypothesized rate: Enter the value of the rate for the test's null hypothesis.

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