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Filename: controllers/calculator.php

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mean. If we consider 100 different samples and evaluate 95% confidence interval for each sample, then 95%

confidence interval means nearly 95 out of 100 confidence interval contains the true population mean. 95

Confidence interval calculator is the online tool which can evaluate this interval value.

sample mean is 30, find the 95% confidence interval for the given mean number.

In order to find the 95% confidence interval (μ), we can use the formula:

where x = Sample mean = 30

σ = standard deviation = 22

n = sample size = 12

t

30 – (2.2010 * 22/√12) < μ <30 – (2.2010 * 22/√12)

sample mean is 16, find the 95% confidence interval for the given mean number.

In order to find the 95% confidence interval (μ), we can use the formula:

where x = Sample mean = 16

σ = standard deviation = 7

n = sample size = 5

t

16 – (2.7764 * 7/√5) < μ <16 – (2.7764 * 7/√5)