A quality of life survey was conducted with employees of a manufacturing firm.of the firms 3000 employees,a sample of 300 was sent questionnaire.two hundred usable questionnaires were obtained for a response of 67% A) the mean annual salary for the sample x=$23200 with s=3000 develop an approximate 95% confidence interval for the mean annual salary of the population B)using information in partb (a) develop an approximate 95 % confidence interval for the total salary of all 3000 employees C)seventy-three percent of respondents reported that they were generally satisfied with their job.develop an approximate 95% confidence interval for the population

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.