Sheet1
Confidence Interval
Confidence Interval for µ Confidence Interval for p
Confidence Level (decimal) Confidence Level
n n
Mean Number of Successes
StDev NOTE: OR
Use t or z? If sample standard deviation is known, use t. Sample Proportion
If population standard deviation is known, use z.
SE ERROR:#DIV/0! (Stdev / sqrt(n)) Sample Proportion ERROR:#DIV/0!
N/A (critical value of z) SE ERROR:#DIV/0!
Margin of Error ERROR:#DIV/0! z 0.000000
Lower Limit ERROR:#DIV/0! Margin of Error ERROR:#DIV/0!
Upper Limit ERROR:#DIV/0! Lower Limit ERROR:#DIV/0!
Upper Limit ERROR:#DIV/0!
Minimum Sample Size μ Minimum Sample Size p
Confidence Level Confidence Level
StDev Proportion
Error Error
z-Value N/A z-Value N/A
Minimum Sample Size ERROR:#VALUE! Minimum Sample Size ERROR:#VALUE!
t Do not
z change
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