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an experiment or analysis. Confidence interval depends on few factors such as sample variation and sample

size and Confidence Interval calculator is an easy tool helpful to find this value.

sample mean is 18, find the 99% confidence interval for the given mean number.

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

where x = Sample mean = 18

σ = standard deviation = 12

n = sample size = 15

t

18 – (2.9768 * 12/√15) < μ <18 – (2.9768 * 12/√15)

sample mean is 40, find the 99% confidence interval for the given mean number.

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

where x = Sample mean = 40

σ = standard deviation = 25

n = sample size = 10

t

40 – (3.2498* 25/√10) < μ <40 – (3.2498 * 25/√10)