A survey was administered to 50 tertiary students to investigate how many hours of charity work they complete during the semester. A brief extract of this study’s findings are as follows: The survey of 50 students provides a sample mean of 30.4, with a 95% confidence interval between 15.4 and 45.4. Which of the following is a valid interpretation of the reported confidence interval? There is a 95% probability that the true average number of hours spent doing charity work during the semester is between 15.4 and 45.4 hours.   We are 95% confident that the average number of hours spent doing charity work during the semester by students in this sample is between 15.4 and 45.4 hours.   There is a 95% probability that a randomly selected student did charity work between 15.4 and 45.4 hours during the semester.

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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.