Provide an appropriate response.A study was conducted to det…

Provide an appropriate response.A study was conducted to determine if the salaries of librarians from two neighboring cities were equal. A sample of 15 librarians from each city was randomly selected. The mean from the first city was $28,900 with a standard deviation of $2300. The mean from the second city was $30,300 with a standard deviation of $2100. Construct a 95% confidence interval for μ1 – μ2.

Determine whether the sampling is dependent or independent….

Determine whether the sampling is dependent or independent. Indicate whether the response variable is qualitative or quantitative.One hundred men suffering from high cholesterol were randomly assigned to receive placebo or a cholesterol-lowering medication. After three months, the mean cholesterol level of those receiving placebo was compared with the mean cholesterol level of those receiving the medication.