To find out approximately how many hours its residents are spending playing cards at a senior retirement home, the recreation director conducts a random survey. The table below shows the number of hours per week these randomly selected seniors play cards.


Hours Seniors Play Cards
Senior Citizen Hours Played
Joe 6
Mary 2
Bert 8
Frank 11
Elizabeth 10
Janet 9


What is the estimated number of hours all seniors at this retirement home play cards, the population mean, based on the sample and rounded to the nearest whole hour?
7 hours
8 hours
9 hours
10 hours