A random sample of 24 chemical solutions is obtained, and theirstrengths are measured. The sample mean is 5437.2 and the samplestandard deviation is 376.9.
(a) Construct a two-sided 98% confidence interval for theaverage strength.
(b) Estimate how many additional chemical solutions need to bemeasured in order to obtain a twosided 98% confidence interval forthe average strength within a margin of error that is 150
