A researcher is examining the gradate student lifestyle at UNCG, and wants to find out how many hours each week the average graduate student spends on class reading and homework. She obtains a list of every graduate student currently enrolled in coursework at UNCG and takes a simple random sample of 144 graduate students and find that the average student in her sample spends 17 hours a week on class reading and homework, with a standard deviation of 3 hours. She wants to use this information to infer how much time the entire population of graduate students on homework each week.   a. What is the standard error for the sampling distribution of time spent on homework? b. What is the 95% confidence interval for time spent on homework?

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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.