An express delivery service needs to estimate the average weight of a package sent overnight. A random sample of 20 packages is randomly selected. The weights in pound, are as follows; 0.4ib 1.2ib 3.7ib 1.1ib 2.3ib 5.0ib 0.2ib 4.1ib 0.8ib 6.8ib 9.8ib 7.5ib 3.5ib 4.7ib 3.3ib 2.8ib 1.0ib 5.9ib 4.6ib 0.1ib Give a 95% and 99% confidence interval for the average weight for all package sent overnight.

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