Posted by Nesa on .
A random sample of 16 midsized cars tested for fuel consumption gave a mean of 26.4 kilometers per liter with a standard deviation of 2.3 kilometers per liter.
i) Assuming that the kilometers per liter given by all midsized cars have a normal distribution, find a 99% confidence interval for the population mean μ.

Statistics 
PsyDAG,
99% = mean ± 2.575 SEm
SEm = SD/√n