STATISTICAL TECHNIQUES AND TOOLS
T DISTRIBUTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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When should you use the t-test? (select all that apply)
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When you are testing a proportion/percentage of a population
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When you are testing for a mean
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When you are given the population standard deviation
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When you are ONLY given the sample standard deviation
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Explanation:
Detailed explanation-1: -Generally, they are most useful when the standard deviation is known. Like z-tests, t-tests are calculations used to test a hypothesis, but they are most useful when we need to determine if there is a statistically significant difference between two independent sample groups.
Detailed explanation-2: -The t-distribution is most useful for small sample sizes, when the population standard deviation is not known, or both. The t-distribution is similar to a normal distribution. It has a precise mathematical definition.
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