Question: The SD of two samples are 8 and 12 sample sizes are 200 and 100. Find the standard error of the difference between the

The SD of two samples are 8 and 12 sample sizes are

The SD of two samples are 8 and 12 sample sizes are 200 and 100. Find the standard error of the difference between the means and also find the confidence interval at 0.05 level of significance mean of sample are 60,50

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