**PURPOSE**- Computes the confidence interval for each point of an average image resulting from adding a particle series. Input are the error probability of the confidence interval and the average and variance files. (Source: Haenicke, MPI Goettingen.)

**SEE ALSO****EP**[Error Probability]

**USAGE**- .OPERATION: CI

- .AVERAGE: AVA001

[Enter the name of the file containing the average of each averaged image point. This is obtained by using operation 'AS'.].VARIANCE: STD001

[Enter the name of the file containing the variance of each averaged image point. This is obtained by using operation 'AS R'.].UPPER LIMIT OUTPUT FILE: UCI001

[Enter the name of the file to receive the upper limit for confidence interval associated with the estimated mean for the choice of the error probability.].LOWER LIMIT OUTPUT FILE: LCI001

[Enter the name of the file to receive the lower limit for confidence interval associated with the estimated mean for the choice of the error probability.].NUMBER OF FILES ADDED: 56

[Enter the number of images added when the average image was formed.].ERROR PROBABILITY IN %: 5

[The error probability in % for confidence interval.]

**NOTES**

- For an elementary introduction into the theory of
statistical inference, see (e.g.) P. Armitage,
*Statistical Methods in Medical Research*, Blackwell Scientific Publications, p99ff.

**SUBROUTINES**- CONF, NORPPF

**CALLER**- CONF1

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