The personnel department of an organization wants to apply cost-cutting measures for improving efficiency. As the first step, the personnel department wants to curtail telephone expenses incurred by...

The personnel department of an organization wants to apply cost-cutting measures for improving efficiency. As the first step, the personnel department wants to curtail telephone expenses incurred by employees. For this, personnel department has taken a random sample of 10 employees and gathered the following data about telephone expenses (in thousand rupees) in the previous year: 10, 12, 24, 23, 11, 14, 15, 34, 16, 23 Construct a 95% confidence interval to estimate the average telephone expenses of the employees in the population.