Casio FX-9860GII-L-IH User Guide - Page 342
size positive integer of sample 1, of sample 2
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6-6-7 Confidence Interval u 2-Prop Z Interval 2-Prop Z Interval uses the number of data items to calculate the confidence interval for the defference between the proportion of successes in two populations. The following is the confidence interval. α is the level of significance. The value 100 (1 - α) % is the confidence level. Left = x1 n1 - x2 n2 - Z α 2 x1 n1 1- x1 n1 n1 + x2 n2 1- n2 x2 n2 n1, n2 : size of sample x1, x2 : data Right = x1 n1 - x2 n2 + Z α 2 x1 n1 1- x1 n1 n1 + x2 n2 1- n2 x2 n2 Perform the following key operations from the statistical data list. 4(INTR) 1(Z) 4(2-P) Data is specified using parameter specification. The following shows the meaning of each item. C-Level confidence level (0 < C-Level < 1) x1 data value (x1 > 0) of sample 1 n1 size (positive integer) of sample 1 x2 data value (x2 > 0) of sample 2 n2 size (positive integer) of sample 2 Save Res list for storage of calculation results (None or List 1 to 26) Execute executes a calculation After setting all the parameters, use c to move the highlighting to "Execute" and then press the function key shown below to perform the calculation. • 1(CALC) ... Performs the calculation. Calculation Result Output Example 20050401