How to calculate the mean+-standard deviation in papers?

Mean plus or minus standard deviation = verage (a1:a1000)+/-stdevp (a1:a1000).

Mean and standard deviation are important indicators reflecting data distribution in statistics.

Mean is a measure of the trend in data set, and its typical formula is a = (x1+x2+x3+...+xn)/n.

Standard deviation is a measure of data dispersion trend, and its typical formula is standard deviation d = √ {[(x1-a) _+(x2-a) _+(x3-a) _+...+(xn-a) _]/n}.

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My paper was not checked and analyzed again. What happened? How can we find out the result?

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