1) A random sample, size 50, is taken from a large population, measuring the time it takes to complete a race.
Calculate a 95% confidence interval around the sample mean
2) Do you use the z or t value? What value is used?
3) Interpret the confidence interval in a sentence.
4) Explain why you used either z or t.
The solution provides step by step method for the calculation of confidence interval for mean. Formula for the calculation and Interpretations of the results are also included.