Confidence_Intervals_for_Difference_of_Means

Confidence_Intervals_for_Difference_of_Means - Estimation...

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Estimation of a Confidence Interval for the Diffrence Prof. M.Vaisfeld Between Two Population Means with t distribution May 9'09 α = 0.1 (see handout #11) Sample 1 Sample 2 15 15 11 7 2 2.5 Pooled estimate (11.4) of the common variance is 5.125 0.82664 28 1.406223 4 1.701131 4 ± 1.406223 or [ 2.593777 , 5.406223 ] Estimation of a Confidence Interval for the Diffrence Between Two Population Means with t distribution DON'T ENTER ANY DATA IN THE CELLS A40:D44 !!! α = 0.1 Sample 1 Sample 2 The cells A39:D43 display 15 15 the copy of data entered 11 7 in the cells A6:D10 above. 2 2.5 14 1.7613101358 14 1.7613101358 1.7613101 0.82664 1.455969 4 ==> 4 ± 1.455969 [ 2.544031 , 5.455969 ] Enter all numerical data only in the block of cells A6:D10 (the entered values are copied automatically in the block of cells A39:D43 below.) n 1 = n 2 = n 1 and n 2 are the sizes of the samples 1 and 2, x mean_1 * = x mean_2 * = x mean_1 * and x mean_2 * are the sample means, s 1 = s 2 = s 1 and s 2 are the sample standard deviations. A.
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