The relationship between use of hormone replacement therapy (HRT) during peri-and post menopause periods and breast cancer was explored in a study involving 400 breast cancer cases and 800 non-cases. In this study it was found that 198 cases and 250 of controls had confirm that they used HRT.     Build the 2X2 table consist only with data that will help you to estimate the association between HRT and breast cancer. 2. Calculate the odds ratio of breast cancer comparing ‘never HRT users’ versus ever HRT users’ and provide a one sentence interpretation of the results  3. Calculate the attributable fraction due to exposure to HRT use on breast cancer and explain in one or two sentences the meaning of your findings

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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.