Dear Peter,

Thanks for your kind reply, just follow what you've suggested, i check the information of the result of following code, while i get a little trouble in finding the DF information, would you mind helping me with that?

3dttest++ -prefix corr_result \
-setA allSubs \
Sub1 CA3-DG_P3_1_z_left+orig \
Sub2 CA3-DG_P3_2_z_left+orig \
Sub3 CA3-DG_P3_3_z_left+orig \
Sub4 CA3-DG_P3_4_z_left+orig \
Sub5 CA3-DG_P3_5_z_left+orig \
Sub6 CA3-DG_P6_1_z_left+orig \
Sub7 CA3-DG_P6_2_z_left+orig \
Sub8 CA3-DG_P6_3_z_left+orig \
-covariates covariates.1D


(env27) [rp@localhost prot]$ 3dinfo corr_result+orig
++ 3dinfo: AFNI version=AFNI_19.3.11 (Nov 1 2019) [64-bit]
Dataset File: corr_result+orig
Identifier Code: XYZ_RHBtc-LqAfMZ2Xekm3pOxA Creation Date: Tue Nov 19 10:32:28 2019
Template Space: ORIG
Dataset Type: Func-Bucket (-fbuc)
Byte Order: LSB_FIRST [this CPU native = LSB_FIRST]
Storage Mode: BRIK
Storage Space: 1,835,008 (1.8 million) bytes
Geometry String: "MATRIX(0.3125,0,0,-10,0,-0.3125,0,10.27441,0,0,0.4,-4.17828):64,64,28"
Data Axes Tilt: Plumb
Data Axes Orientation:
first (x) = Right-to-Left
second (y) = Posterior-to-Anterior
third (z) = Inferior-to-Superior [-orient RPI]
R-to-L extent: -10.000 [R] -to- 9.688 [L] -step- 0.312 mm [ 64 voxels]
A-to-P extent: -9.413 [A] -to- 10.274 [P] -step- 0.312 mm [ 64 voxels]
I-to-S extent: -4.178 -to- 6.622 [S] -step- 0.400 mm [ 28 voxels]
Number of values stored at each pixel = 4
-- At sub-brick #0 'allSubs_mean' datum type is float: -0.135973 to 0.760704
-- At sub-brick #1 'allSubs_Tstat' datum type is float: -10.6224 to 62.319
statcode = fitt; statpar = 6
-- At sub-brick #2 'allSubs_Score' datum type is float: -0.00896952 to 0.0134939
-- At sub-brick #3 'allSubs_Score_Tstat' datum type is float: -5.27929 to 10.0023
statcode = fitt; statpar = 6