95 Confidence Interval Calculator

95 Confidence Interval Calculator

All you need to know about 95% Confidence Intervals

Sample 95% Confidence Interval Problem

What is the 95% Confidence Interval of your sample of bowling scores with mean x̄=200 and standard deviation σ=10 and sample size n=100 ?
CI-Setup: x̄ ± z*σ/√(n)
Here, 200 ± 1.96 * 10/√(100)
200 ± 1.96 * 10/10
200 ± 1.96*1
Finally, the 95% Confidence Interval is [198 , 202]

Get it now? Try the above 95% Confidence Interval  Calculator a few more times.

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