z D8Pack*?8 @EACT EACT1 f)ā܁PT8hlDH,pāPtxā   L ā ======060604 =======v2-Sample Z Interval 2-Sample Z Interval calculates the confidence interval for the difference between two population means when the population standard deviations of two samples are known. The following is the confidence interval. @ is the level of significance. The value 100 (1@)% is the confidence level.Left=(љ)(Z(@2)QnQn |Right=(љ)(Z(@2)QnQn  | :mean of sample 1 :mean of sample 2 Q:population standard deviation of sample 1 Q:population standard deviation of sample 2 n:size of sample 1 nsize of sample 2 @STAT[EXE]8Pack*?( @GUIDEdKEYLOG(8NOTE`'$%2222222222xz$|The following shows the meaning of each item in the case of list data specification. The Data ...... data type C-Level ... confidence level (0C-Level<1) Q ........ population standard deviation of sample 1 (Q>0) Q ........ population standard deviation of sample 2 (Q>0) List(1) ... list whose contents you want to use as data of sample 1 (List1 to 26) List(2) ... list whose contents you want to use as data of sample 2 (List1 to 26) Freq(1) ... frequency of sample 1 (1 or List1 to 26) Freq(2) ... frequency of sample 2 (1 or List1 to 26) Save Res .. list for storage of calculation results (None or List1 to 26) Execute ... executes a calculation The following shows the meaning of parameter data specification items that are different from list data specification. ... mean of sample 1 n ... size (positive integer) of sample 1 ... mean of sample 2 n ... size (positive integer) of sample 2 @STAT[EXE]8Pack*?( @GUIDEKEYLOG(\NOTE0 '$%$2 $2$2$2$22$22xz Left ... confidence interval lower limit (left edge) Right .. confidence interval upper limit (right edge) ..... mean of sample 1 ..... mean of sample 2 xQ .. standard deviation of sample 1 (Displayed only for Data: List setting.) xQ .. standard deviation of sample 2 (Displayed only for Data: List setting.) n ..... size of sample 1 n ..... size of sample 2