# What does Welch's t-test measure?

Welch's t-test is a two-sample location test, and is used to test the hypothesis that two populations have equal means.

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Welch's t-test is a statistical test used to determine if there is a significant difference between the means of two independent groups. It is similar to the Student's t-test but is more appropriate when the variances of the two groups being compared are unequal and the sample sizes are different. Welch's t-test calculates the t-statistic by comparing the difference between the means of the two groups to the variation within the groups, taking into account the different sample sizes and variances. It is commonly used in research and data analysis to assess whether there is a statistically significant difference between the means of two populations or groups.

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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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