Question

Shards of clay vessels were put together to reconstruct rim diameters of the original ceramic vessels found at the Wind Mountain archaeological site. A random sample of 10 ceramic vessels gave the yielded a mean of 15.8 cm and a standard deviation of 3.5 cm.

A) Find the critical value used in computing the Margin of Error for an 80% confidence interval.

B) Calculate the Margin of Error.

C) Compute an 80% confidence interval for the population mean µ of rim diameters for such ceramic vessels fund at the Wind Mountain archaeological site.

D) Suppose instead that the sample size had been 100 instead of 10. The margin of error would

E) Suppose instead you had been calculating a 90% confidence interval. The length of the interval would

Answer 1