Simple function for obtain a T statistic from sample mean, stdev & hypothetical mean

Question

John Strong 2015-7-10

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https://ww2.mathworks.cn/matlabcentral/answers/229461-simple-function-for-obtain-a-t-statistic-from-sample-mean-stdev-hypothetical-mean

评论： Frank Schumann 2023-5-1

Is there a Matlab function that will take sample values (mean, stdev) together with a hypothetical mean and return a T value without requiring me to enter all the sample data?

If it is not a native feature, can you recommend an open source library of Matlab functions?

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Answer 1

Jeff Miller 2023-5-1

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/229461-simple-function-for-obtain-a-t-statistic-from-sample-mean-stdev-hypothetical-mean#answer_1226384

在 MATLAB Online 中打开

Here you go:

t_observed = (sample_mean - hypothetical_mean) / sample_sd * sqrt(n);

n is the number of scores averaged to get the sample_mean

sample_sd is the version normalized by n-1 (i.e., MATLAB's default)

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Frank Schumann 2023-5-1

Thank you. Maybe I misunderstood the original question then: I'm looking for a function to get the full ttest results, that also calculates h, p, stats, allows me to specify a one or two-sided test, etc.

The original question was not. I can do all this manually, but it would be so much more convenient to be able to simply input summary statistics (mean, std, n) into the ttest or ttest2 function.

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