A sample of 6 students has the mean marks as 4 and SD as 1.5. A second sample of 4 students has the mean marks as 9 and
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A sample of 6 students has the mean marks as 4 and SD as 1.5. A second sample of 4 students has the mean marks as 9 and
A sample of 6 students has the mean marks as 4 and SD as 1.5. A second sample of 4 students has the mean marks as 9 and SD as 2.5. If two samples are combined, then find the variance of the combined samples. Mavi mavinna
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