When conducting a hypothesis test for the population mean when sigma is known and the sample size is 30 or more, the test statistic follows the a. Student's t-distribution. O b. normal distribution O c. binomial distribution O d. exponential distribution.

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Q: Use a t-distribution to find a confidence interval for the difference in means µ = µ₁ −μ₂ using the…

A: The solution and answers are in image uploaded below. Thanks!