Question: A stratified simple random sample was taken with the following results. a. Develop an estimate of the population mean for each stratum. b. Develop an

A stratified simple random sample was taken with the following results.

a. Develop an estimate of the population mean for each stratum.
b. Develop an approximate 95% confidence interval for the population mean in each stratum.
c. Develop an approximate 95% confidence interval for the overall population mean.

Stratum (h) 138 103 210 30 25 50 50 .78 21 200 250 100 20 30 25

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