>99%probability is reached with just 57 people,and 50%probability with 23 people These conclusions are based on the assumption that each day of the year (except February 29)is equally probable for a birthday >Real-life birthday distributions are not uniform since not all dates are equally likely Statistics for Managers Using Microsoft Excel Chap 1-7  99% probability is reached with just 57 people, and 50% probability with 23 people.  These conclusions are based on the assumption that each day of the year (except assumption that each day of the year (except February 29) is equally probable for a birthday  R l ea -lif bi thd di t ib ti t life birthday distributions are not uniform since not all dates are equally likely Statistics for Managers Using Microsoft Excel Chap 1-7