Casio FX-9860GII-L-IH User Guide - Page 341
executes a calculation, C-Level < 1
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6-6-6 Confidence Interval u 1-Prop Z Interval 1-Prop Z Interval uses the number of data to calculate the confidence interval for an unknown proportion of successes. The following is the confidence interval. α is the level of significance. The value 100 (1 - α) % is the confidence level. Left = x n - Z α 2 1 n x n 1- x n n : size of sample x : data Right = x n + Z α 2 1 n x n 1- x n Perform the following key operations from the statistical data list. 4(INTR) 1(Z) 3(1-P) Data is specified using parameter specification. The following shows the meaning of each item. C-Level confidence level (0 < C-Level < 1) x data (0 or positive integer) n size of sample (positive integer) 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 Left confidence interval lower limit (left edge) Right confidence interval upper limit (right edge) ˆp estimated sample proportion n size of sample 20050401