Which two of the following are assumptions made when used a two sample test of mean with equal standard deviations?
The sampling distribution of the difference of means is a t-distribution.
The populations have equal but unknown standard deviations; therefore, we "pool" the sample standard deviations.

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mglyne4715 mglyne4715

29-11-2022
Mathematics

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Which two of the following are assumptions made when used a two sample test of mean with equal standard deviations?
The sampling distribution of the difference of means is a t-distribution.
The populations have equal but unknown standard deviations; therefore, we "pool" the sample standard deviations.

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BhawnaKumari BhawnaKumari · Answer 1 · 2022-12-02T13:18:38+01:00

The sampling distribution of the difference of means is a T distribution. The populations have equal but unknown standard deviation's; therefore, we "pool" the sample standard deviation's. are the two assumptions made when used a two sample test of mean with equal standard deviations

What is Standard deviations?

The square root of the variance is used to calculate the standard deviation, a statistic that expresses how widely distributed a dataset is in relation to its mean. By calculating the deviation of each data point from the mean, the standard deviation may be determined as the square root of variance.

The higher the deviation within the data set, the further the data points deviate from the mean; consequently, the higher the standard deviation, the more dispersed the data.

A dataset's dispersion from its mean is measured by standard deviation.

It is determined as the variance's square root.

Learn more about Standard deviations from the link below

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