DDonuts claims that the waiting time of customers for service is normally distributed with a mean of three minutes and a standard deviation of one minute. The quality assurance department found in a sample of 50 customers that the mean waiting time is 2.85 minutes. At a 0.05 level of significance, can we conclude that the mean waiting time is less than three minutes? 1. 2. 3. 4. 5. Problem Definition of u Null hypothesis, Ho Alternative hypothesis, Ha Level of significance Test statistics Critical region, Critical value & Decision rule 6. Computed value 7. Decision 8. Conclusion HO:μ = 3 Ha: μ<3 Level of significance = 0.05

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Q: What are appropriate conditions to conduct a hypothesis test?

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Q: chart for hypothesis test

A: Please find the explanation below. Thank you.

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Q: Explain what it means to accept the null hypothesis?

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Q: Describe the 5 elements of a hypothesis test.

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Q: What are important features of hypothesis testing?

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Q: What is the formula for a 2-sample hypothesis test?

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Q: Explain what it means to reject the null hypothesis or fail to reject the null hypothesis.

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Q: provide an example of hypothesis testing using the t score test

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A: Basics:

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