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- When the Population Variance is unknown, the appropriate test statistic to used is t test.
- How to Determine The Appropriate Tool When: Variance unknown
- What is T test? A T test is a type of inferential statistic used to determine if there is a significant difference between the means of two groups, which may be related in certain features.
- How to Determine The Appropriate Tool When: Variance unknown
- REMIDER: T test is the appropriate tool to used when: The population standard deviation is unknown. The sample standard deviation is known. The population is normal or nearly normally distributed. The sample size is less than 30 (n30).
- How to Determine The Appropriate Tool When: Variance unknown
- When the Central Limit Theorem is used, the appropriate test statistic is using standard deviation by sample standard deviation in the formula.
- How to Determine the Appropriate Tool when: CENTRAL LIMIT THEOREM
- REMEMBER: Z test is the appropriate tool to used in Central Limit Theorem when: If the population is normally distributed or the means y = y 0, the z has a standard normal distribution. The sample size is extremly large and the variance is known or unknown
- How to Determine the Appropriate Tool when: CENTRAL LIMIT THEOREM
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