Q2) A researcher wants to estimate the proportion of a population which possesses a givencharacteristic.A random sample of size 1250 is taken and .67 of the sample possess the characteristic.Compute 90% confidence interval to estimate the population proportion.

Q3) A study is going to be conducted in which a population mean will be estimated using a 92% confidence interval. The estimate needs to be within 12 of the actual population mean.The population variance is estimated to be around 2200.Determine the necessary sample size (n).