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ľ³æ (ÕýʽдÊÖ)

[ÇóÖú] ÇóÇë½â¶ÁÉó¸åÈËÌá³öµÄ¹ØÓÚÎÒÎÄÕÂÖз½²î·ÖÎöµÄÉó¸åÒâ¼û

¸÷λ´óÏÀ£¬×î½üͶÁËһƪ²ÄÁϵÄÎÄÕ£¬È»ºóÔÚÎÄÕÂÖУ¬ÎÒÓÃone way ANOVA¶ÔÎÒµÄÊý¾Ý½øÐÐÁË·ÖÎö¡£µ«ÊÇÉó¸åÈË˵ÎҵķÖÎöÊÇ´íµÄ£¬»¹Çë¸÷λ°ïÎÒ¿´¿´Éó¸åÈ˾ßÌåÊÇʲôÒâ˼£¬ÒòΪÎÒ²»ÊÇÊýѧ±³¾°£¬ËùÒÔ¶ÔËûÌáµÄÒâ¼û£¬ºÃ¼¸´¦²»´óÃ÷°×£¡Ïȸ½ÉÏÉó¸åÒâ¼û£º

However, there a big issue in data analysis to prevents this manuscript to
be acceptable for publication in its present. It is a pity. I suggest the
authors follow my suggestions and redo statistical analysis, redo table and
rediscuss the data. Because your analysis is wrong, it is no useful to
review all sections. I recommend the manuscript could be acceptable after
the following issues are addressed and resubmit the paper

1. Suggestions: Redo your data analysis using a correct statistical analysis
method, provide which multi-treatment method you use, what method you use
for check data normality, which method you use to check residue and variance
assumptions, provide analysis model, indicate fixed and random effects in
your model. Provide SEM data in your table. Provide p value in your table.
Provide n= ?? in your table that you use for statistical analysis


2. In the manuscript, you said you used Fisher test to separate mean.
Fishers protected LSD method (based on T test) has very high error I. You
set error 5% but actually error is 21%. Too high. See the following Table.


Table 1. The probability of type I error using t test for multi-sample pair
comparison

K
(how many means:  )
How many treatments T test: ¦Á significant level

0.20 0.10 ¦Á =0.05 0.02 ¦Á =0.01 0.001

2 0.20 0.10 0.05 0.02 0.01 0.001
3 0.41 0.23 0.13 0.05 0.03 0.003
4 0.58 0.36 0.21 (21%) 0.09 0.05 0.006
5 0.71 0.47 0.29 (29%) 0.13 0.07 0.009
10 0.96 0.83 0.63 0.37 0.23 0.034
20 1.00 0.98 0.92 0.71 0.52 0.109

1.00 1.00 1.00 1.00 1.00 1.00


3. You said you studied ¡°the effects of different levels of static
deformation on the orientation and content of different secondary structures
in single A. pernyi silk fibers.¡± When treatments are quantitative data, we
have to check linear, quadratic and cubic effect of treatment levels on
response parameters. You did not do that.

4. We discuss the results based on correct statistical analysis. You can see
that you analyses are incorrect. You should redo the analysis before you can
discuss. If treatment level has quadratic effect, you should give optimal
point using 2nd derivative function. If your treatment has cubic effect, you
should give max and min points.

ÆäʵÔÚÎÒµÄÎÄÕÂÖУ¬ÎÒÖ»ÊÇÓÃone way ANOVA ±È½ÏÁ˲»Í¬À­ÉìÌõ¼þϵ°°×ÖʽṹµÄ±ä»¯ÈçÏÂ±í£¨ÕâÊÇÆäÖÐÖ®Ò»£¬ÆäËû»ù±¾²î²»¶à£©£º

conformation                                                   content (%)
                            strain=0        strain=0.1         strain=0.2         strain=0.3
¦Â-sheet                    38¡À3                38¡À2                38¡À4                37¡À3
random coil*           44¡À1             46¡À2                46¡À2                48¡À3
¦Á-helix**               18¡À3                17¡À3                15¡À4                15¡À3
* It shows significant difference by one way ANOVA analysis (significance level at p < 0.0001).
** It shows significant difference by one way ANOVA analysis (significance level at p < 0.05).

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yaofengluan

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onesupeng

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ÍòËê×ÓÀÉ: ½ð±Ò+5, ¡ïÓаïÖú 2013-02-09 16:13:51
ÍòËê×ÓÀÉ: ½ð±Ò+5, ¡ïÓаïÖú 2013-02-09 16:15:59
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nono2009

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No gains, no pains.

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3Â¥: Originally posted by yaofengluan at 2013-02-09 09:56:55
Äã×Ô¼ºËÑË÷ÏÂcorrect statistical analysis°É£¬Õâ¸ö·ÖÎöµÄǰÌáÄãÒªÏÈÑé֤һϣ¬¾ÍÊǵÚÒ»¸öÉó¸åÈËÌáµÄÕý̬ÐÔ£¬²Ð²îÒÔ¼°·½²îÒ»ÖÂÐÔ£¬Ö¸Ã÷¹Ì¶¨Ð§Ó¦ºÍËæ»úЧӦµÈ£¬Ñù±¾ÊýÒÔ¼°aµÈ¡£T test ·¸µÚÒ»Àà´íÎóµÄ¸ÅÂʴ󣨼´ÆúÕæ£© ...

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