We take a simple random sample size of 50 from a population with unknown variance. We find the sample mean to be 25 and the sample standard deviation. Give the 90% confidence interval for the population mean. Give the 95% confidence interval for the population mean. Give the 99% confidence interval for the population mean.
Added by Michael D.
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However, it is not provided in the question. Assuming we have the sample standard deviation (let's call it s), we can calculate the confidence intervals using the formula: Confidence interval = sample mean ± (t-value * (sample standard deviation / sqrt(sample Show more…
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