Question: Q:1 A university, is interested in estimating the average time per week devoted to study in the library by the students of this university. The

Q:1

  1. A university, is interested in estimating the average time per week devoted to study in the library by the students of this university. The university is running undergraduate, master's degree and doctoral programs. Number of students registered for the three programs is 250, 50, and 20 respectively. Since the value of the study variable is likely to differ considerably with the program, the investigator divided the population of students into 3 strata: undergraduate program (stratum I), master's program (stratum II), and doctoral program (stratum III). The researcher team selected WOR simple random stratified samples as shown in the following table. Estimate the average time per week devoted to study by a student in the library. Also, build up the confidence interval for this average.

Q:1A university, is interested in estimating the average time per week devoted

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