Casio FX-9860GII-L-IH User Guide - Page 343
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6-6-8 Confidence Interval Left confidence interval lower limit (left edge) Right confidence interval upper limit (right edge) ˆp1 estimated sample propotion for sample 1 ˆp2 estimated sample propotion for sample 2 n1 size of sample 1 n2 size of sample 2 k t Interval u 1-Sample t Interval 1-Sample t Interval calculates the confidence interval for an unknown population mean when the population standard deviation is unknown. The following is the confidence interval. α is the level of significance. The value 100 (1 - α) % is the confidence level. Left = o- tn - 1 α 2 xσn-1 n Right = o+ tn - 1 α 2 xσn-1 n Perform the following key operations from the statistical data list. 4(INTR) 2(t) 1(1-S) The following shows the meaning of each item in the case of list data specification. Data data type C-Level confidence level (0 < C-Level < 1) List list whose contents you want to use as sample data (List 1 to 26) Freq sample frequency (1 or List 1 to 26) Save Res list for storage of calculation results (None or List 1 to 26) Execute executes a calculation The following shows the meaning of parameter data specification items that are different from list data specification. 20050401