What assumptions must hold true to use the t distribution to make a confidence interval for µ?
Answer to relevant QuestionsExplain the various alternatives for decreasing the width of a confidence interval. Which is the best alternative? Find the value of t from the t distribution table for each of the following. a. Confidence level = 99% and df = 13 b. Confidence level = 95% and n = 36 c. Confidence level = 90% and df = 16 a. A sample of 100 observations taken from a population produced a sample mean equal to 55.32 and a standard deviation equal to 8.4. Make a 90% confidence interval for µ b. Another sample of 100 observations taken from the ...A random sample of 36 mid-sized cars tested for fuel consumption gave a mean of 26.4 miles per gallon with a standard deviation of 2.3 miles per gallon. a. Find a 99% confidence interval for the population mean, µ. b. ...You are working for a supermarket. The manager has asked you to estimate the mean time taken by a cashier to serve customers at this supermarket. Briefly explain how you will conduct this study. Collect data on the time ...
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