我的门限回归,P值是显示双门槛显著,三门限不显著,但是在画图的时候第一个门限的图看着不显著,我觉得是因为第一个门限值的F值过大导致的,我这还能做门限回归吗,一般对F值来说,不是越大越好吗,我能继续按照这个数据写毕业论文吗,求求大神救救我,我想毕业

,我的数据整理和画出的图都上传到图片了
Threshold estimator (level = 95):
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model | Threshold Lower Upper
-----------+-----------------------------------------
Th-1 | 34.8500 34.2100 45.9800
Th-21 | 34.8500 34.2100 45.9800
Th-22 | 17.4300 17.1100 17.4800
Th-3 | 9.8300 9.4000 10.1000
-----------------------------------------------------
Threshold effect test (bootstrap = 300 300 300):
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Threshold | RSS MSE Fstat Prob Crit10 Crit5 Crit1
-----------+-------------------------------------------------------------------
Single | 1170.6114 0.3185 1614.29 0.0000 12.3550 14.6663 21.6455
Double | 1146.5107 0.3120 77.25 0.0000 12.3943 13.9499 18.7512
Triple | 1129.0969 0.3072 56.68 0.5633 82.2548 87.3758 96.8494
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Fixed-effects (within) regression Number of obs = 3680
Group variable: Code Number of groups = 736
R-sq: within = 0.4876 Obs per group: min = 5
between = 0.4349 avg = 5.0
overall = 0.4562 max = 5
F(9,2935) = 310.32
corr(u_i, Xb) = 0.0303 Prob > F = 0.0000
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Perf | Coef. Std. Err. t P>|t| [95% Conf. Interval]
-------------+----------------------------------------------------------------
Top3 | .0102886 .0031952 3.22 0.001 .0040236 .0165536
Sizeemployee | .0535741 .0445249 1.20 0.229 -.0337292 .1408773
Age | -.0484163 .0085084 -5.69 0.000 -.0650994 -.0317332
state | .0144249 .0644674 0.22 0.823 -.1119811 .1408309
boardsize | .0036599 .0165053 0.22 0.825 -.0287033 .036023
|
_cat#c.CSR |
0 | .1524541 .0075299 20.25 0.000 .1376898 .1672185
1 | .1041655 .0028837 36.12 0.000 .0985112 .1098198
2 | .0882833 .0018546 47.60 0.000 .0846469 .0919197
3 | .0306992 .0012005 25.57 0.000 .0283454 .033053
|
_cons | -1.802742 .4265244 -4.23 0.000 -2.639059 -.9664242
-------------+----------------------------------------------------------------
sigma_u | .70107606
sigma_e | .62024254
rho | .5609483 (fraction of variance due to u_i)
------------------------------------------------------------------------------
F test that all u_i=0: F(735, 2935) = 4.74 Prob > F = 0.0000