Index of refraction |
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2.25 |
1.60 |
1.38 |
1.41 |
1.27 |
The data gathered by scientist Etse during physical science laboratory ten on the index of refraction of water is reported in the table.
Confidence interval statistics | |||
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Statistic or Parameter | Symbol | Equations | OpenOffice 3.0 on Ubuntu 9.04 |
Degrees of freedom | df | n − 1 | =COUNT(data)-1 |
Find a tcritical value from a confidence level c | tc | =TINV(1-c,df) | |
Standard error of the sample mean | SE | =STDEV(data)/SQRT(sample size n) | |
Calculate a margin of error for the mean E for n ≥ 5 using sx. | E | =tc*sx/SQRT(n) | |
Calculate a confidence interval for a population mean μ from a sample mean x and an error tolerance E | x − E ≤ μ ≤ x + E |