Question: A machine is set up such that the average content of juice per bottle equals . A sample of 100 bottles yields an average content

A machine is set up such that the average content of juice per bottle equals . A sample of 100 bottles yields an average content of 48cl. Calculate a 90% and a 95% confidence interval for the average content. Assume that the population standard deviation s = 5cl. ( i really need help with this question i need to know how to do it on PSPP software) thank you for your time

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