Estimate the mean value of a continuous measurement using a single sample.

Instructions: Enter parameters in the green cells. Answers will appear in the blue box below.

N =

Sample size

m =

Sample mean

S =

Sample standard deviation

Confidence level

Standard error of the mean = SEM = S/√N = 0.000

t(α, N-1) = 0.000

Confidence interval = m +/- (t(α, N-1)*SEM)

Mean =

Lower bound:

Upper bound:

Reference:

Hulley SB, Cummings SR, Browner WS, Grady D, Newman TB. Designing clinical research : an epidemiologic approach. 4th ed. Philadelphia, PA: Lippincott Williams & Wilkins; 2013. Appendix 6A, page 73.