Average length of stay of a sample of 20 patients discharged from a general hospital was 7 days with a standard deviation of 2 days. A sample of 24 patients discharged from a chronic disease hospital has an average of 36 days and a standard deviation of 10 days. Assuming unequal variances and normal populations, find a 95% confidence interval for difference in population mean length of stay between hospital types using the unpooled procedure

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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.