Find the 95% confidence interval for the difference between two means based on this information about two samples. Assume independent samples from normal populations. (Use conservative degrees of freedom.) (Give your answers correct to two decimal places.)
Sample | Number | Mean | Std. Dev. |
1 | 21 | 34 | 29 |
2 | 25 | 23 | 27 |
Lower Limit | |
Upper Limit |
Mean1
= 34
Sample size1 (n1) = 21
Standard deviation1 (s1) = 29
Mean2
= 23
Sample size2 (n2) = 25
Standard deviation2 (s2) = 27
Confidence interval(in %) = 95
Since we know that
Required confidence interval = (11.0-16.6487, 11.0+16.6487)
Required confidence interval = (-5.6487, 27.6487)
Lower Limit | -5.6487 |
Upper Limit | 27.6487 |
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