W8Pack*?8 @EACT0EACT1fB(<ԁ PT؁Hx<@x|Ёԁp@́  @ ā ȁ @ D ` ́ , ` d @ D h | Ё ā======060513 =======v2-Sample t Test 2-Sample t Test compares the population means when the population standard deviations are unknown. The 2-Sample t Test is applied to t-distribution. The following applies when pooling is in effect. h t=љxpQ(1n1n) xpxpQ=(nљ1)xQ‰(nҙ1)xQnщnҙ2  Z df=nщnҙ2 :mean of sample 1 :mean of sample 2 xQ:standard deviation of sample 1 xQ:standard deviation of sample 2x n:size of sample 1 n:size of sample 2 xpQ:pooled sample standard df:degrees of freedom The following applies when pooling is not in effect. dThey t=љxQnxQn r df=1Cnљ1(1C)nҙ1  C=x& C=xQn(xQnxQn)  :mean of sample 1l :mean of sample 2d xQ:standard deviation of sample 1 xQ:standard deviation of sample 2 n:size of sample 1 n:size of sample 2 df:degrees of freedom o@STAT[EXE]8Pack*?( @GUIDE`KEYLOG(4NOTE\&%%222222222xz The following shows the meaning of each item in the case of list data specification. Data ...... data type K ........ sample mean value test conditions (Kspecifies twotail test, Kspecifies onetail test where sample 1 is greater than sample 2.) 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) Pooled .... pooling On (in effect) or Off (not in effect) Save Res .. list for storage of calculation results (None or List1 to 26) Execute ... executes a calculation or draws a graph The following shows the meaning of parameter data specification items that are different from list data specification. ...... mean of sample 1 xQ .. standard deviation (x>0)of sample 1 n ..... size (positive integer) of sample 1 ..... mean of sample 2 xQ .. standard deviation (x>0)of sample 2 n ..... size (positive integer) of sample 2 @STAT[EXE]8Pack*?( @GUIDEhKEYLOG(<NOTEd0 &%%$2$2$2$2$2$222$2222)xz[F6 KK .. direction of test t ...... t score p ...... p-value df ..... degrees of freedom ..... mean of sample 1 ..... mean of sample 2 xQ .. standard deviation of sample 1 xQ .. standard deviation of sample 2 xpQ .. pooled sample standard deviation (Displayed only when Pooled: On setting.) n ..... size of sample 1 n ..... size of sample 2 #[Save Res] does not save the K condition in line 2.