Statistics and Probability

The mean age of 20 youth volunteers in a community project is 175 years with a standard deviation of 2years. If the sample comes from an approximately normal distribution, what is the point estimate and confidence interval of the population mean. Use the 94% confidence level. The average weight of 25 chocolate bars selected from a normally distributed population is 200g with a standard deviation of 10g Find the point and interval estimate using 95% confidence level